Quote by Sir Alfred Jules Ayer
There never comes a point where a theory can be said to be true. The most that one can claim for any theory is that it has shared the successes of all its rivals and that it has passed at least one test which they have failed.
Summary
This quote suggests that the truth of a theory can never be fully established. Rather than being proven as true, a theory can only be considered successful by demonstrating its superiority over rival theories and by passing tests that they have failed. The quote implies that theories are constantly being challenged and refined, and it is through comparison and testing that they gain credibility. It also highlights the idea that no theory can claim absolute truth and that the pursuit of knowledge is an ongoing process.