[fastball]

Let me try another example: you claim that anyone who drinks a cup of X liquid will die. I drink your cup of liquid, and do not die. I have falsified your theory. I do not know why I did not die, I do not assume anything about why I did not die – I just didn't die. Theory falsified, no alternative theory proposed.

With regard to dark matter: yes there are many competing / mutually exclusive theories surrounding it, but that does not then mean in order to invalidate one of those theories you need to have picked a different one that you like better.

[d0mine]

Your examples assume the absolute and complete knowledge. It is not our world. There is no theory of everything (yet or ever).

If I would try to find and explain alternative hypotheses for your "human intuition/everyday experience " examples they would sound contrived this invalidating themselves. Imagine trying to explain quantum theory/general relativity to a Victorian and their counter-examples all use objects from their life.