Final answer:
Scientists never claim to 'prove' their theories since scientific knowledge is based on evidence and probability, allowing for future revision with new evidence. 'Proof' implies certainty, which is not applicable in science where ideas evolve over time.
Step-by-step explanation:
Good scientists never claim to 'prove' their theories because science is founded on the principle of evidence and probability. Scientific theories and laws are constantly retested and refined in light of new evidence and discovery. The term 'proof' typically implies finality and certainty, which is contrary to the nature of scientific inquiry. Scientific theories are supported by a wealth of evidence, not proven, to allow for the possibility of future discoveries that might challenge or refine current understanding. What is accepted today might need to be revised tomorrow if new evidence emerges.
Scientific knowledge continually builds upon itself. For example, the Germ Theory of Disease became widely accepted only after extensive evidence accumulated over two centuries. This exemplifies how scientific ideas are open to revision and how they withstand the test of time.
An observation through a microscope or viewing Earth from space influenced scientific theories significantly, and future discoveries await. Hence, scientists prefer the term 'support' over 'prove' to keep the door open for further discovery.