Do humans have an inherent capacity to decide that a conclusion follows necessarily from premises?

[Speakpigeon]

Ancient humans started with fire yada yada yada....

What's understandable in your soliloquy is massively irrelevant.

Once again, you prefer to indulge in a silly rant than to address the topic at hand.

Let me remind you of the question: Do humans have an inherent capacity to decide that a conclusion follows necessarily from premises?

I think that question is really simple... But not for you apparently. It's clearly way beyond the capacity of your brain.
EB