Aristotelian Logic

We just learned a bit about Aristotle and his philosophy, but he was also the first figure to truly establish logic as a field unto itself, and he developed many of the formalities this field still uses today. Types of sentences, induction vs. deduction, modal logic, there is a lot to unpack here, so let's dive right in!
Script by Luca Igansi
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[@archivist17]

That is by far the clearest explanation of Aristotelian logic I've ever heard. Thanks Dave.

[@AndyRhodes1]

I have watched at least thirty of your videos over the years. Great work, Dave! Very clear and succinct. This video was excellent. In two weeks, I will begin teaching a philosophy course to a high school student who is enthusiastic about this subject. This video will be quite helpful.

[@Heylomusicpianocomposer]

Symbolic Logic is a great course in college. I think everyone should be aware of how important it is. It wasn’t easy for me. It’s so valuable. Question everything.

[@DrBear-rk4qb]

This is a great summary! I teach mathematics and logic at a community college, and this video would be great to add to my supplemental materials for students. Thanks, Professor Dave! 🙌

[@yeahmad3730]

Thank you for your work❤

[@jamiegallier2106]

Thank you for this series!

[@DeepSpace145]

Thank you ! A good test for the validity of syllogisms is the Gensler's Star Test... (Although I heard that it doesn't work with all types of syllogisms).. But it is enlightening to know why it works.

[@tal1989]

This video is superb , thanks Dave

[@TheMemesofDestruction]

Good stuff! Thank you!

[@italiandarthvader]

I didn't quite understand how the chain of reasoning in deductive reasoning is used step by step so thank you very much for that. Never stop what you do, and I can't wait for your video on frege.

[@wertelka_1]

Actually, there are immortal KZbinrs. Neuro-sama, MotherV3, and probably many more. P1: Some KZbinrs are AIs P2: All AIs are not alive C1: Some KZbinrs are not alive P3: No non-living thing is mortal C2: Some KZbinrs are immortal P4: Dave claimed that all KZbinrs are mortal C3: Dave made a false statement

[@9fmradisapratama]

You have failed to deliver SciencephiletheAI. The skynet will punish the weebs soon enough.

[@pavanapv2207]

Aristotle's logic is terminus logic given if ends in terms and thus the division of logics is between the terminus and the non-terminus, whereas "propositional", "symbolic"( both useless for division as most logics of in the history of the West has employed the symbol from the alphabet for the purposes of particular demonstrations. Take them as describe logic, for abundant use of arbitrary symbols is the attribute of modern logic) modern( very useful for the division with non-modern logic. Very useful as we get insight knowledge of historic unfolding where knowledge is divisible in other disciplines as well. Modern Physics and it's non-modern counter part, modern Grammar and it's the modern.

[@sophie600]

thank you so much for this !!

[@user-po6kl1om3r]

Thank you... You did great...

[@donchristie420]

Every election cycle, we are reminded of the lack of logic we possess

[@journeyman4814]

isnt the election cycle never ending?

[@anuragsharma4159]

It could be and could not be.Because people vote on basis of interests .Some people may have wrong understanding of interests and some are just instinctively vote in favour of their people.

[@user-em5bl9je3u]

How about stop basing your politics around elections and join your local IWW

[@encouraginglyauthentic43]

​@@user-em5bl9je3u The factories have been outsourced to poorer countries. People will work for pennies if their basic needs can't be met otherwise.

[@cyan3714]

Old McDonald had a farm Negative-universal affirmative-particular Negative-universal affirmative-particular Negative-particular

[@waelfadlallah8939]

Haha😂

[@mateocortes4148]

Professor Dave, are you planing on uploading the debate you did with James Tour?

[@ProfessorDaveExplains]

Yeah when I get home

[@mateocortes4148]

@@ProfessorDaveExplains awesome thanks dude

[@shankz8854]

@@ProfessorDaveExplains yes!! Can’t wait!!

[@9fmradisapratama]

​@@rayc5577Even Better! God bless

[@Mrfunny663vnb83]

​@@ProfessorDaveExplains Also please do a commentary or review on that debate with OOL researchers. Especially those whom James used in the debate for example Lee saying OOL is Scam .

[@troyjacobs8530]

Thanks Dave :)

[@MJAli89]

The debate was the best one this year so far, it got a bit personal but fun.

[@9fmradisapratama]

OOT Professor Dave, is syllogism related or similar from _categorization_ our biased minds tend to sort and generalize things or are they completely separated from the topic? Like this Aristotelian logic is talking about public logic like objective universal facts such as "raccoons aren't wolves" and categorization is talking about social psychology based on our personal judgment from information (and misinformation) we gathered?

[@hailsagan8886]

On a side note,kandiss taylor from georgia who ran on the platform jesus,guns,babies did a video w david weiss,and she's now a flerf. Idiocracy was meant to be a cautionary tale

[@qzh00k]

If you shift a bit left does it become true? How about base 2 math and how we use it.

[@raoulduke7668]

Can you make a video debunking fools like graham hancook who think the coordinates of the gizeh pyramid correlate with the speed of light because the egyptians surely used metric back then?

[@galileog8945]

Potholer54 has already demolished Hancock. Check it out: nobody can beat Potholer.

[@LPVince94]

Hancock has been disected a couple times now. He still continues with his stick as if nothing happened and his followers don't care. Evidently it would be a pointless endevour.

[@raoulduke7668]

@@LPVince94 Thing is, this is not only hancook. There are whole youtube channels dedicated to falsifying history and claiming bs like the pyramids transmitted wireless energy or something like that. It's hilarious.

[@raoulduke7668]

@@galileog8945 Thank you, I will check it out!

[@galileog8945]

@@LPVince94 Pointless especially because Potholer really destroyed the guy thoroughly, and I cannot imagine anyone doing it better.

[@dany_fg]

Based Aristotle

[@MarcelinoDeseo]

7:49 I assume bayesian probability is the recent development of modal logic, right?

[@Valdagast]

_Half a bee, philosophically_ _Must, ipso facto, half not be_ _But half the bee has got to be_ _A vis-a-vis its entity, you see?_

[@waelfadlallah8939]

No i don't see, what the heck is that!

[@davidh.4944]

@@waelfadlallah8939It's Monty Python's _Eric the Half-a-Bee_ song. _But can a bee be said to be_ _Or not to be an entire bee_ _When half the bee is not a bee_ _Due to some ancient injury?_ P.S. I also recommend "A Lesson In Logic" from _The Album of the Soundtrack of the Trailer of the Film of Monty Python and the Holy Grail_ (Cyril Connolly?)

[@marknieuweboer8099]

Funnier is 1. Every dog is human. 2. Prof Dave is a dog. 3. So Prof Dave is human.

[@lewdwig]

If Macdonald was old, then he had a farm. EIEIO. QED.

[@georgemissailidis3160]

Nice video. I have a few remarks (see below, if interested) but apart from that the video was very lucid and cut-to-the-chase. Firstly, I think the argument at 6:05 isn't valid (what would make it valid is if the second premise were instead "All mortals are human", rather than "All humans are mortal"). Not sure whether that is important, though, since it still falls under the same mnemonic encoding, but I thought it might be helpful to point out. Secondly, Aristotle's principle of non-contradiction is not _just_ that something cannot be and not be, at the same time, but more precisely that this cannot happen at the same time _and in the same respect_ --- e.g. something can _be_ red and _not be_ yellow, but red and yellow are in different respects of colour. (Usually you'll find this emphasis being made by scholastic philosophers, like Aquinas, during when the works of Aristotle were being translated and disseminated around the world.) Finally, I think it would have been useful to mention that Aristotelian logic works with sentences which have a _single_ predicate and a _single_ subject only (compared to the multi-subject and multi-predicate logic we work with today, largely developed by Frege and also Boole); often young philosophy enjoyers learning Aristotelian logic for the first time find it very clarifying and useful for argument analysis, but it shouldn't be the curriculum for how to do logic, since there are more precise and more general alternatives (which is why I appreciate the video's historical and hermeneutic flavour, I think that's the best way of presenting this information). At any rate, though, very good video!

[@waelfadlallah8939]

Well phrased

[@qc1okay]

Correct about the error in Dave's video at 6:05. I was about to post the same thing but figured I'd check the comments first to be sure it wasn't already here. Dave indeed did mean to type "All mortals are human", but it's anybody's guess as to whether he'll correct that error. Last time I checked, he had not corrected his sports error from last month about athletes being on a winning streak from factors other than randomness, despite multiple commenters telling him.

[@davidh.4944]

I believe his error at 6:05 is in getting the entire syllogism backward, rather than just P2. It really should be this: P1: All KZbinrs are human. P2: All humans are mortal. C: All KZbinrs are mortal. Saying "All mortals are human" would work make the original syllogism valid, but it would be obviously unsound.

[@junaidsabri9367]

Kindly you give an on non Aristotelian logic ??

[@heyheyhey1481]

Schrödinger entered the chat 5:52

[@eg_manifest510]

2:55 and to think I was being taught philosophy by a Birdog this entire time

[@waelfadlallah8939]

Fan of DC 😊

[@-JA-]

👏👍

[@abcdefg4570]

In quantum physics, things are and are not at the same time, as opposed to what Aristotle said.

[@dmitrysamoilov5989]

I work at McDonald's but, I don't think we could have gotten to para-consistent logic without first discovering "normal" logic.

[@JakubS]

Only because we don't know which combination of outcomes occured, so we have to assume that all happened at different proportions so that the mathematics matches real probabilistic measurements.

[@Mrfunny663vnb83]

Isn't that about probabilistic outcomes rather actually and literally being in a superposition and being a actual contradiction?

[@proxagonal5954]

No, not really

[@thomzwiefler6305]

Im a perinatal peripatetic with a periwinkle pigmented perineum.

[@waelfadlallah8939]

Huh?!

[@waelfadlallah8939]

That's an STD!

[@thomzwiefler6305]

Not if it's everywhere.

[@waelfadlallah8939]

You're in advanced stage my friend

[@thephilosophermma8449]

Frege’s Analytic philosophy challenge Aristotlelian logic rather it’s built upon it but expands it using mathematics . Aristotles laws of logic are universal and any attempt to disprove them would already require the person to presuppose it .

[@souravbanerjee5270]

Read nyaya and navya nyaya ancient but most sophisticated logic body. ❤

[@Nxck2440]

JT debate upload when

[@ProfessorDaveExplains]

most likely tomorrow

[@jessekyle6998]

good video but at 6:17 the example given didnt follow as the predicate being mortal didnt change to being an operator. all humans being mortal and all youtubers being mortal doesnt mean that all youtubers are humans. it would have to be that all youtubers are mortal and all mortal things are human to follow

[@PotatoChips-jy9pk]

James kept screaming over Dave and saying "show me the research" and ignores any of the papers. loolz

[@undine8750]

If I say "Everyone named Professor Dave is a nice person", and there's only one Professor Dave, is this a universal or particular statement?

[@tylerchambers5809]

Won’t you be releasing a video of your debate with James Tour?

[@ProfessorDaveExplains]

yes

[@michaelgum97]

6:16 I know that you probably used it randomly, but I do want to point out a funny little. The conclusion itself isn't completely true in the age of AI KZbinrs.

[@sergeycardinal7500]

Man, are you joking about "Barbara" sentence? How did you deduct from: P1: All KZbinrs are mortal P2: All humans are mortal that C: All KZbinrs are human? Equally you can say that "all humans are KZbinrs" :D

[@scrambledsocks1606]

I miss "He knows a lot about science stuff, professor dave explains" whenever you make a science video pls keep that intro

[@ProfessorDaveExplains]

But philosophy isn't science, so I use the alternate "all kinds of stuff".

[@jungleperry]

killing others is immoral war involves killing war is immoral ALL WAR

[@Ken00001010]

Are AI KZbinrs both mortal and immortal? Mortal in the sense that they can be turned off, and immortal in the sense that they don't have a necessary termination (as humans still do).

[@9fmradisapratama]

I think it's the source operator the premise refers to. Some generic AI with fake pre dialogue to sound scary and self aware are pre programmed to say such things. Also, they're man made objects with the operator being human. They can be easily immortalized through KZbin videos and clips so they'll never age as well but what I think being 'mortal' here is just an aging flesh. Not avoiding death. Not even the current AI can escape death such as their programming can just be purged or aging hardware will make them to not operate. The fatal is when it gets to the memory hardware they can't backup. But that might be a big gibberish wrong statement. I think I might confuse the operator and things in particular. Let the video and Professor Dave explain.

[@hailsagan8886]

Where's the debate?

[@ProfessorDaveExplains]

I’ll post it when I get home, kiddos. Stick to your echo chamber where you get to pretend I didn’t humiliate James.

[@hailsagan8886]

I'm an atheist. Not a tour fan

[@hailsagan8886]

​@Sean S what convinced you that Christianity is true and should it convince me too?

[@Dunger974]

@@hailsagan8886he was responding to the first reply

[@ProfessorDaveExplains]

Yeah I meant the mindless Tour drone. They’re infesting my channel.

[@siddharth-wy2kp]

1st

[@Gaming_Vegan_Ape]

I was too busy with my winded comment. Haha

[@Gaming_Vegan_Ape]

Off topic, but I'm new here and just wanted to say you rock. I just watched the "debate" with tour and Yourself. I've never seen either of you before. You're a god damn legend. I appreciate those willing to call out those who deceive others. Also, I love your "barney style" breakdowns. 👍🏾

[@9fmradisapratama]

Honestly it's so painful getting him being hit repeatedly by machine gun tactics I wish he could just go Dave persona on comment section. But you know Professor Dave is actually a chill guy in real life.

[@jayzeigel5772]

Things are always and not at the same time

[@GetMoGaming]

Dave is an Ape. Ape go bananas. Dave go bananas.

[@ProfessorDaveExplains]

That’s cute

[@GetMoGaming]

@@ProfessorDaveExplains 🤣😂🤣 There's a deeper meaning in there, somewhere (about humanity, not Dave lol)

[@Strawberry-jp5wv]

🏳️‍⚧️Celebrate Trans Lives🏳️‍⚧️

[@user-pl3ep6rh4l]

🤢🤢🤢🤢🤢🤢🤢🤢🤢🤢🤢🤢🤢🤢🤢🤢🤢

[@uchicha666]

Stupid bot

[@Yotaciv]

@@physicshuman9808 🏳️‍⚧️ is illogical ideology. The only take away they have from this is universal affirming sentences. Lol

[@Yotaciv]

Males have penises. Bob has a penis. Bob is therefore a male. That’s logic. Women have uteruses. Pam has a uterus Therefore pam is a woman.

[@blackpatriot3]

Illogical

[@captainp.2721]

Wheres the tour debate mr dave?

[@ProfessorDaveExplains]

Will upload soon

[@captainp.2721]

@@ProfessorDaveExplains Thank you :)) can't wait 🤘👍

[@davidmartin5764]

Dave I just watched you're debate..interview ...with Jesse Lee Peterson and I was shocked how you were being fired at ..you did a good job and there is no way you had to justify yourself at any point in that discussion..I'm disgusted at Jesse for the way he treated you totally disgusted...that was out of order it's not you're fault for the way he sees life and expected you to answer his deluded views on Life...your ok Dave

[@The-unMighty-Eagle]

HEY man check your email plz

[@The-unMighty-Eagle]

HEY man check your email plz

[@The-unMighty-Eagle]

HEY man check your email plz

[@The-unMighty-Eagle]

HEY man check your email plz

[@The-unMighty-Eagle]

HEY man check your email plz