"Falsifiability" is the term coined by Karl Popper for the idea that a hypothesis or theory addresses the observable world only insofar as it can be found false as the result of some observation or physical experiment. For instance, the proposition "all cats have fur" can easily be proven false with the observation of a single hairless cat. The proposition "the world will end in 5 the year 3035 " is impractical to falsify, but still passes the test of falsifiability in that there exists the logical possibility that 3035 will come and go without the world ending. To the contrary, it is possible to posit that everything that happens is the will of Zeus. No matter what experiment we designsuch as praying to Zeus to give us the answer or daring Zeus to strike us with light-ning-we can always infer that the result is the will of Zeus. Such a proposition, as conceived here, is not 10 falsifiable. Popper claimed that a falsifiable theory is the only kind that can truly be scientific, or at least useful to the scientific community.
By that logic, we can also say that no theory should be formed that has no chance of being true. However, seeing as that kind of theory is much less likely to be formed, it is understandable that Popper does not devote that much time to the criterion of "confirmability."

According to the passage, which of the following does not meet the criteria for falsifiability?

(A) All birds are black.
(B) Earth is the only planet in the universe with intelligent life.
(C) It rains on Mars every day.
(D) The sun will explode in 100,000 years.
(E) No human being lives forever.



To which of the following is the author most likely to agree regarding "confirmability"?

(A) It is a more important theory than falsifiability.
(B) It does not have much practical, scientific use.
(C) It applies to a broad range of theories.
(D) It is an unreasonable idea.
(E) Popper should have developed this idea along with falsifiability.