# Thread: Is there ANYTHING that everyone can agree on?

1. Originally Posted by Turtledove
We agree to disagree.
If only. :P Not many people want to agree on disagreements. :P

2. One may or may not agree with the statement that one may or may not agree with this statement.

3. Originally Posted by sprinkles
One may or may not agree with the statement that one may or may not agree with this statement.

4. We will all die one day?

5. Originally Posted by Riva
We will all die one day?
My mother earnestly does not believe that.

6. I suppose we could pull out a cheesy descartes style quote: "All we know is that somewhere....somehow..... and in some form we exist."

*EDIT* Oh yeah and things like being part of the imagination of something else or a dream comes under the heading of 'in some form' .

7. Originally Posted by greenfairy
All men are mortal. Sacrates is a man. Therefore Socrates is mortal.
P-->Q
P
______
Q

Don't you love logic?

(Maybe people who don't use logic wouldn't agree...)
This is incorrectly formulated. In propositional logic the statement would be of the form P,Q ⊨ R ; which isn't semantically interesting. The way it is formulated, it reads as something like 'if Socrates is a man then Socrates is mortal, Socrates is a man, therefore Socrates is mortal', which doesn't say anything about other men.

In order to preserve the expressive power of the statement, you'd have to switch to first-order predicate logic:
∀x(Px→Qx),Pa ⊨ Qa

8. Originally Posted by The Outsider
This is incorrectly formulated. In propositional logic the statement would be of the form P,Q ⊨ R ; which isn't semantically interesting. The way it is formulated, it reads as something like 'if Socrates is a man then Socrates is mortal, Socrates is a man, therefore Socrates is mortal', which doesn't say anything about other men.

In order to preserve the expressive power of the statement, you'd have to switch to first-order predicate logic:
∀x(Px→Qx),Pa ⊨ Qa
Yes, I thought of that. I was just going for the simple form of Socrates is a mortal.

9. Originally Posted by Riva
We will all die one day?
Unless a galactic super civilization invades earth and takes us into the negative matter of the universe, immortal in a higher dimension at a spiritual level.

10. To answer this question one would have to specify what constitutes a non-agreement - does it have to be an active act of disagreement, or does lack of agreement suffice. In the latter case the answer is clearly no, as is immediately apparent from cases of people in vegetative states for example. In the former case the question shifts to a question not just about agreement, but also one of knowledge, i.e. if you formulate knowledge as a true justified belief and you hold that such a belief exists then it seems to follow that there are things that everyone with sufficient data and mental capacity would necessarily agree on, but such a formulation is in itself quite problematic as has been shown by Gettier, Russell and Wittgenstein among others and it does seem to lead to a number of psychological and metaphysical assumptions that may not be so obvious.

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