The Importance of Fruitfulness in Metaphysics

"If it's actually a correct theory that people are, that differences in intelligence really just boil down to nothing more than what your interests are and how much time you spent on them," says Popper. "That is absolutely a theory that should have testable consequences." But when we test the theory, we don't always necessarily test the central thesis,. We test the consequences of the central thesis., he adds. 'This isn't that abnormal in science'