• It is only accepted after the person who came up with it has died.

  • It is a method or device that applies scientific knowledge for some specific purpose.

  • It generates testable hypotheses, is supported by a large body of evidence, and is broad in scope.

  • It must demonstrate the effect of one variable by testing control groups and experimental groups.


It generates testable hypotheses, is supported by a large body of evidence, and is broad in scope.