“Theories are just theories”, and “what theory do you find the most credible” implies a lack of understanding of what science is. This worryingly leans into the sort of thinking that is encouraged by science deniers and underpins anti-science religious movements such as creationism or political movements such as climate change denial. Don’t fall into this trap.

Scientific theory is a vigorous process involving testing and retesting, gathering evidence and undergoing rigorous scrutiny and testing. The saying “Theories are just theories” refers to the common venacular meaning of theory which implies something is unsubstantiated or a guess. That is not a scientific theory.

Please don’t confuse a scientific theory for the layman use of the word theory, and don’t allow that to sow doubt in what science is.

We are in a worrying time where science is being attacked and people are being made to doubt it. But science is built on a rigorous process with a solid evicence base. Science deals in facts and reproducible evidence, not guess work.

If you don’t find a mainstream scientific theory credible then review the evidence for yourself.