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roychess

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roychess
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  • We should be clear that the word contra positive has Different CONTEXTS. Aristotle used the word quite differently than mathematicians in the late 1850's. Aristotelian logic uses semantics to evaluate propositions and not just swapping symbols. A…
    in Valid Argument Forms Comment by roychess June 2017
  • @"Alex Divine" said: @"Cant Get Right" said: Treating yo self is an important part of the process leading up to test day as well! So, in othttp://imgur.com/CQhyZOD HAHA! Ice cream > LSAT It seems to express lsat --&g…
    in The Wait Comment by roychess June 2017
  • I think you are missing the point I am making. I am saying that studying logic should include rules that allow the students to convert those English sentences to arrive at the correct solutions. What you seem to be expressing is the whatever works…
    in Only....if Comment by roychess June 2017
  • The problem now is what do you mean by conditionally valid. Conditionally valid usually refers to actual existing things. I am not giving my opinion here. Aristotelian logic does not assume anything technically. I am aware people use that termi…
    in . Comment by roychess June 2017
  • @akistotle said: Thank you, @roychess, for explaining logic. I think 7Sagers do understand what "only if" means logically since we learn it in the Core Curriculum. As you can see from J.Y.'s comment, we were having a discussion on how ambiguou…
    in Only....if Comment by roychess June 2017
  • I am saying that the form of the argument alone will not always give the correct conclusion. Your conclusion may be true by itself. Your conclusion is not true solely based on the premises. What logical forms are supposed to do is provide a UNIVE…
    in . Comment by roychess June 2017
  • @akistotle said: I may be missing something here but the original post says: [Argument #1] Premise 1: A ---> C Premise 2: B ---> C Conclusion: ~A some ~B This argument is valid because Premise 1: Dogs ---> Mammal…
    in . Comment by roychess June 2017
  • Well the mechanical rules do indeed work: that is you should never be able to get the wrong answer strictly following the rules. All cases you get it wrong is a case you broke at least on or more of the rules. Test this for yourself. The rule is …
    in Only....if Comment by roychess June 2017
  • @akistotle said: Hi @roychess @roychess said: Akistotle The form in your post is not the same as the original post and not the same as mine. The original post said: @asdf1234guy said: A ---> C…
    in . Comment by roychess June 2017
  • @"Cant Get Right" said: None of that is wrong @roychess , but like you say: @roychess said: Some of what works for the LSAT will not fly In a college class. We're really only concerned with the LSAT here. Not with a coll…
    in Some statements Comment by roychess June 2017
  • Thank you for understanding my post. What I really wanted to make clear is that the subject you allegedly learn logic from does matter. The common deception is that most people think or believe logic is logic. That all logic is the same. We now …
    in Some statements Comment by roychess June 2017
  • @goingfor99th said: It is logically valid. I think you may have misread the original post, @roychess. If I did make a mistake can you point it out please? I referred specifically to the argument form being NOT valid. I agree that a proposi…
    in . Comment by roychess June 2017
  • Akistotle The form in your post is not the same as the original post and not the same as mine. Your example is reversed. Your label C is in the wrong spot. Can I use terminology here: the label C is called a middle term because it repeats in the…
    in . Comment by roychess June 2017
  • Would it not be easier to learn concepts regarding propositional relations? One must be careful because what I see is a mix of logics here.some people are confusing mathematical logic with classical logic. When you use the symbols it is absolutely…
    in Some statements Comment by roychess June 2017
  • Can some one clarify how this form is valid??? What I see is an INVALID conclusion from the premises. BUT I also see double word play on the term VALID. The conclusion is inthe contrapositive form of the real conclusion. So to say the conclusion…
    in . Comment by roychess June 2017