“The only way to test a hypothesis is to look for all the information that disagrees with it.”— John W. Campbell
“The experimenter who does not know what he is looking for will not understand what he finds.”— Claude Bernard
“There are two possible outcomes: if the result confirms the hypothesis, then you've made a measurement. If the result is contrary to the hypothesis, then you've made a discovery.”— Enrico Fermi
“We are to look for no other criterion of the truth of a hypothesis, but its affording a physically true explanation of the phenomena.”— William Herschel
“The most important feature of this hypothesis is that the elementary unit of transmitter release is not the single molecule, but a multi-molecular quantum of acetylcholine.”— Bernard Katz
“...the null hypothesis is never proved or established, but is possibly disproved, in the course of experimentation.”— Ronald Aylmer Fisher