adj. With respect to the scientific method, capable of being proven true or false.
adj. Capable of being devised, or given by will.
the GNU version of the Collaborative International Dictionary of English
adj. Capable of being tested or proved.
adj. Capable of being devised, or given by will.
The Century Dictionary and Cyclopedia
That may be tested.
In law: Capable of being devised or given by will or testament.
Capable of witnessing or of being witnessed.
Word Usage
"But his religious views apparently contain testable but false, propositions about the natural, physical world, propositions which contradict his scientific writings."