A hypothesis is empirical or scientific only if it can be tested by experience.... A hypothesis or theory which cannot be, at least in principle, falsified by empirical observations and experiments does not belong to the realm of science.


Biological Evolution: Natural Selection or Random Walk, American Scientist, November/December 1974 (p. 700)

Francisco J. Ayala Quotes

A hypothesis is empirical or scientific only if it can be tested by experience.... A hypothesis or theory which cannot be, at least in principle,...

A hypothesis is empirical or scientific only if it can be tested by experience.... A hypothesis or theory which cannot be, at least in principle,...

A hypothesis is empirical or scientific only if it can be tested by experience.... A hypothesis or theory which cannot be, at least in principle,...

A hypothesis is empirical or scientific only if it can be tested by experience.... A hypothesis or theory which cannot be, at least in principle,...