I have been in debate for a while now with me friend. I come here looking for feedback and possible outlooks to related sources.
The question we posed a long time ago is interesting one: why do we not kill ourselves?
Without more context, I want to propose the conclusion of my friend Alpha: the reason us humans do anything, is because of the biological reward system in our brains that gives us pleasure and pain. In more concise words: we want to do things because of pleasure.
I take it upon myself, my burden of existing, to prove him wrong, or incomplete. The following is my thought:
All things we do are ultimately because of pleasure. (1, Given)
All things that are pleasurable we want to do. (reversing 1st statement because of logical equivalence)
All things that are painful we do not want to do. (2, Negating the previous line)
All things pleasure and pain are temporary; they have a beginning and end. (3, Given)
Pleasure is temporary. (Restated from 3)
The idea that pleasure being temporary can be painful. (Given)
I feel pain from the idea of pleasure being temporary. (4, Using myself as an instance of the previous line)
I do not want the idea of pleasure being temporary. (Changing line 4 to look like line 2)
The idea that pleasure is temporary comes up every time I feel pleasure. (5, An extreme but possible assumption)
I feel pain every time I feel pleasure. (Rephrasing line 5 to be more dramatic)
I want to feel pleasure and I do not want to feel pleasure. (A contradiction)
I conclude that not all things we do are not ultimately because of pleasure, because that leads to a contradiction.
This is not a formal proof, but I would love to get some feedback. Do you agree with these statements? Am I assuming too much? Any flaws or changes to make it more convincing?