I quickly browsed through the titles and noticed the following 2 words a lot: hypothesis and theory.
If we go to the cambridge dictionary:
hypothesis: an idea or explanation for something that is based on known facts but has not yet been proved
theory: a formal statement of the rules on which a subject of study is based or of ideas that are suggested to explain a fact or event or, more generally, an opinion or explanation
Did you actually read that wiki-page yourself? Or did you do some selective reading? (My last 2 questions were off-topic, feel free to ignore them)