What central characteristic must a scientific hypothesis possess to remain within the realm of science?

Answer

It must be falsifiable.

A hypothesis must be falsifiable, meaning there must be some possible observation or experiment that could empirically prove the statement incorrect. If it cannot possibly be proven wrong, it falls outside the realm of testable science.

What central characteristic must a scientific hypothesis possess to remain within the realm of science?
Definitionsciencetheorymethodhypothesis