“believe in wi-fi”
If you don’t believe wi-fi exists, you’d be a fool.
i don’t believe in wifi, just like i don’t believe in trees. i know they’re there. that requires no belief.

The belief would be that your senses aren’t being actively deceived. Also, that you’re not a Boltzmann brain hallucinating in the void.

I personally believe all the axioms of science apply. It’s still fun to poke at them.

the atheist says “i will not believe”. the agnostic says “i can not believe”. one is as dogmatic as the beliefs they purport to refute, the other lacks the capacity for dogma, as belief for them is simply not possible.

Belief in a null is a lot more reasonable than belief in something so powerful it can pretend to be a null.

Belief that I am not in a Truman show like environment is a lot more reasonable (without evidence) than belief that I am in a Truman show, and they are doing a perfect job.

That doesn’t mean I don’t try disproving the null hypothesis.

I don’t think reasonable is even it for me, it’s just a helpful assumption.

If they are doing a perfect job at a Truman show type situation, there’s nothing you can do, so you might as well assume they’re not and play your role.

It’s more reasonable via Occam’s razor (more complexity is less reasonable, when everything else is equal). However it is still just a belief axiom. You have to assume 1 holds.
Too many cut themselves on Occam’s razor, incorrectly presuming all else equal.

If things are not all equal, then we can slice off a section of the axiom, and start dissecting it, via science. The axiom only applies if things are exactly equal.

E.g. Gravity wave detectors have found oddities, just above the noise floor. These are likely equipment artifacts. They are also consistent with us being in a simulation, and us touching close to the resolution limit. If true (quite unlikely) then it would prove the axiom false.

If you believe in pragmatism, that’s just semantics. A statement is reasonable or valid to the extent that it is useful.