[thrance]

Here is my reasoning: immaterial objects (such as the soul) are by definition outside of the material world, and thus unobservable. We can't ever (dis)prove the existence of an unobservable object.

As for the other questions you mentioned, I still haven't found any reason to believe their answers are unkowable.

If anyone disproves my first reasoning, I will have to consider the question of the soul as worth pursuing again.

Just like in mathematics, if you have sufficient proof that a theorem is unprovable, it is useless trying to prove it!

So no, I don't trust my gut feeling about wether or not to seek the answer to something.