Not even "probably" right. Eg Quantum Physics is more complex than Newtonian. OcRaz is a heuristic that advises that simpler hypotheses should be tested first. It's not a magic SCIENCE! gun.

Occams Razor, often misused as you imply, says not to multiply elements beyond necessity. Newtonian physics doesn't explain observed quantum effects and so there is a necessity to use a more complex system to explain all the observations.

You're quite right to note it's heuristic nature, some people use it as if it's truth generating.

And this is easily testable. We just house a population of animals who sleep in a hermetically sealed environment that provides all that they need, but is never in darkness. After a couple of hundred million years we open the door and see if anyone is napping.

My point was to emphasize that O's Razor only says something is probable, and can't be used to say something is certain.

And then replicate the experiment.