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    The Dumb Logic Thread

    The science forum has the dumb question thread. This is for dumb logic. No need to srart a new thread for every idea. Lump it all together.

    for example.

    If a conclusion follows from a premise that is obviously absurd then the argument is structurally valid.

    The Earth is flat and thin, so if I step off the edge I will possibly fall off and there is no air past the edge..

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    Contributor Speakpigeon's Avatar
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    Quote Originally Posted by steve_bank View Post
    The science forum has the dumb question thread. This is for dumb logic. No need to srart a new thread for every idea. Lump it all together.

    for example.

    If a conclusion follows from a premise that is obviously absurd then the argument is structurally valid.

    The Earth is flat and thin, so if I step off the edge I will possibly fall off and there is no air past the edge..
    That is a very interesting post.

    I wish some expert on mathematical logic could comment.

    To that effect, I would encourage you to explain why you think the argument is "structurally" valid.

    In particular, why do you think the absurdity of the premise makes the argument ipso facto "structurally valid"? I never heard of that one before.
    EB

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    Mazzie Daius fromderinside's Avatar
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    Treasure steve_bank he's an original. Absurd? It's structurally valid.

    Think "treasure blah blah blah original."

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    Super Moderator Bronzeage's Avatar
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    Quote Originally Posted by steve_bank View Post
    The science forum has the dumb question thread. This is for dumb logic. No need to srart a new thread for every idea. Lump it all together.

    for example.

    If a conclusion follows from a premise that is obviously absurd then the argument is structurally valid.

    The Earth is flat and thin, so if I step off the edge I will possibly fall off and there is no air past the edge..
    The If/then structure is more of an observation, than an argument. If I observe the Earth is flat, what is the list of possible following observations. If the Earth is flat, I will able to look over the edge and observe more.

    All men are mortal.
    Socrates is a man.
    Therefore, all men are Socrates.

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    Darn it all to heck, looks like I made a dumb argument. But then that is the thread.

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    Mazzie Daius fromderinside's Avatar
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    dough-ah

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    xx
    Last edited by steve_bank; 08-23-2019 at 05:19 PM.

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    Quote Originally Posted by Bronzeage View Post
    Quote Originally Posted by steve_bank View Post
    The science forum has the dumb question thread. This is for dumb logic. No need to srart a new thread for every idea. Lump it all together.

    for example.

    If a conclusion follows from a premise that is obviously absurd then the argument is structurally valid.

    The Earth is flat and thin, so if I step off the edge I will possibly fall off and there is no air past the edge..
    The If/then structure is more of an observation, than an argument. If I observe the Earth is flat, what is the list of possible following observations. If the Earth is flat, I will able to look over the edge and observe more.

    All men are mortal.
    Socrates is a man.
    Therefore, all men are Socrates.
    if then else is part of logic. Conditional logic.

    p1
    p2
    c1
    c2
    c3
    c4

    If p1 and p2 then ci or If p2 and not p1 then c2 or if not p1 and not p2 then c3 else c4.

    Like algebra formal logic is a shorthand synbolic represention of verbal desriptions.

    A & b is for me the Boolean AND or you might call it conjunction. The two variable truth table.

    a & b = c
    a b c
    f f f
    f t f
    t f f
    t t t

    In words if a or b is false then c is false, if a and b are true then c is true.
    Last edited by steve_bank; 08-23-2019 at 05:18 PM.

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    p1 1 + 1 = 2
    p2 1 + 1 = 3
    c 1 + 1 equals both 2 and 3

    Does the conclusion follow from the premises? Is the argument valid?

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    p1 All Greeks are geeks
    p2 Joe is a Greek
    p3 Not all geeks are Greeks

    Which of the following conclusions are valid.
    c1 Joe is a Greek geek
    c2 Joe may or may not be geek.

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