1. ## 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..

2. Originally Posted by steve_bank
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

3. Treasure steve_bank he's an original. Absurd? It's structurally valid.

Think "treasure blah blah blah original."

4. Originally Posted by steve_bank
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.

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

6. dough-ah

7. xx

8. Originally Posted by Bronzeage
Originally Posted by steve_bank
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.

9. 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?

10. 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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