For a hypothesis to be testable means that it is possible to make observations that agree or disagree with it. If a hypothesis cannot be tested by making observations, it is not scientific. Consider this statement: "There are invisible creatures all around us that we can never observe in any way."

What makes a hypothesis testable?

To be considered testable, some essential criteria must be met: There must be a possibility to prove that the hypothesis is true. There must be a possibility to prove that the hypothesis is false. The results of the hypothesis must be reproducible.

Is a hypothesis always testable?

Testing a hypothesis. Notice that all of the statements, above, are testable. The primary trait of a hypothesis is that something can be tested and that those tests can be replicated, according to Midwestern State University. ... An untestable statement can be reworded to make it testable, though.