SEM121 - Propositions

This E-Lecture discusses the machinery of propositional logic and its limitations. It includes a detailed treatment of the logical connectives and their truth-values.

[@1lucyskywithdiamonds]

This makes so much more sense than my current class. thank you!

[@lisanics7357]

Well done LISANICS is also helpful for the learners of Linguistics kzbin.info/www/bejne/npmlkpRobMeKpNE

[@saraksa9324]

Thank you ... I am taking this course now and your videos were very helpful to me ...keep on :) P.S. I took 16 out of 20 in my midterm exam because of your help

[@EnglishWithMubeen]

Excellent!

[@takayoutube98]

thanks, the video is useful.

[@user-hn2fi3di2r]

This course is very helpful to me. Thank you very much.

[@lisanics7357]

Well done LISANICS is also helpful for the learners of Linguistics kzbin.info/www/bejne/npmlkpRobMeKpNE

[@englishplus1714]

thanks a lot

[@athena_teater]

very nice lecture

[@lisanics7357]

Well done LISANICS is also helpful for the learners of Linguistics kzbin.info/www/bejne/npmlkpRobMeKpNE

[@monirhas.2074]

Thank you very much for the video, its very helpful. but i still have one question; what is the difference between truth and non-truth conditional.

[@bergg2009]

an interesting question. I was able to find answers by searching for "truth and non-truth conditional" right away.

[@chilufyakasongo8894]

Than you so much I learnt alot

[@lisanics7357]

Well done LISANICS is also helpful for the learners of Linguistics kzbin.info/www/bejne/npmlkpRobMeKpNE

[@boaventuramachava6756]

im so glad ,was so much more than water

[@lisanics7357]

Well done LISANICS is also helpful for the learners of Linguistics kzbin.info/www/bejne/npmlkpRobMeKpNE

[@user-iq9pe4ls2j]

At 17:12, why is it understood that the truth value of the conjoined system is true, rather than, let’s say, non-applicable if the antecedent is false? Sorry, I don’t have any background in logic.

[@user-iq9pe4ls2j]

Is this simply how the connective is defined?

[@lisanics7357]

Well done LISANICS is also helpful for the learners of Linguistics kzbin.info/www/bejne/npmlkpRobMeKpNE

[@bergg2009]

I would understand the proposition in terms of "implication", that is "if...then...". Antecedent is also called "premise". The premise could be false, but the outcome nonetheless true, because the "consequence" does not so much depend on the falsity of the premise as much as on the presumed truth value with a false outcome. The later would be nonsensical. But if "I don't jump of the building -> I (still could) die (after all)". The false premise just doesn't negate the outcome. You could also take an example of a promise. "If I promise to do my homework -> I do my homework" "If I promise -> I don't do" - that's a broken promise! "If I don't promise -> I (still might) do" "If I don't promise -> don't do"