I’m allowed to assume, I assume, if I say I’m assuming!
Related terms, but not identical:
Metaphysical truth
Apodictic truth
Logical proof from direct evidence
Reasonable assumption from direct evidence
Reasonable inference from converging lines of direct and circumstantial evidence
Conjecture from circumstantial evidence
Estimation, educated guess, hunch
In descending order of reliability.
Any of these can be valuable, as long as you gave a pretty good account of where they are on the scale.
For instance: I have a hunch that you are probably a person, but you COULD be a Robo-Freep!
AY, AY, A.I.!
I’m sure this means something: to someone.