Fact: 1. A confi rmed or agreed-upon empirical observation or conclusion. 2. Knowledge or information based on real occurrences: an account based on fact. 3. a. Something demonstrated to exist or known to have existed: Genetic engineering is now a fact. That Einstein was a real person is an undisputed fact. b. A real occurrence; an event. Hypothesis: An educated proposal to explain certain facts; a tentative explanation for an observation, phenomenon, or scientifi c problem that can be tested by further investigation. Scientifi c Theory (or Law): An integrated, comprehensive explanation of many "facts," especially one that has been repeatedly tested or is widely accepted and can be used to make predictions about natural phenomena. A theory can often generate additional hypotheses and testable predictions. Theories can incorporate facts and laws and tested hypotheses. Unfortunately, the common/non-scientifi c defi nition for theory is quite different, and is more typically thought of as a belief that can guide behavior. Some examples: "His speech was based on the theory that people hear only what they want to know" or "It's just a theory." Because of the nature of this defi nition, some people wrongly assume scientifi c theories are speculative, unsupported, or easily cast aside, which is very far from the truth. A scientifi c hypothesis that survives extensive experimental testing without being shown to be false becomes a scientifi c theory. Accepted scientifi c theories also produce testable predictions that are successful.

What are the defining words mentioned in this article? Why the article chose those words? Have you used any defining words in situations other than science? Give a scenario of when and why you used the words.