MAD-4A wrote:What? No. A "Law" is something Proven, a Theory is something that is believed but not proven. You start with a hypothesis which is a speculation based on observation. After positive testing, it can be considered a theory. Once it is proven then it becomes a Law. So many people misuse the word Theory to mean something proven - it is not, that is a Law.gcomeau wrote:...Although sometimes people call it Newton's Theory of Gravitation, it was really only a Law. (Not to downplay Newton's accomplishment... but that's so much easier to formulate than a Theory)...
Since Hutch already beat me to the correct definition of terms, I'll just ramble a bit.
This is a hugely popular misunderstanding of what those words mean in science. The problem is that in everyday life "theory" actually has the meaning you're layig out there. Uncle Bob has himself a "theory" about who really shot Kennedy, that kind of thing. Which really just means he has himself some half-assed idea about something.
But Uncle Bob's "theory" and a Scientific Theory are two totally different things. They bear no resemblance to each other whatsoever. in order to be considered a Scientific Theory this is the list of criteria you need to check off:
* It needs to account for ALL available observational data (of relevance, a Theory of Gravity does not for example have to account for your observation that your nephew is unusually fond of peanut butter)
* It needs to make testable predictions.
* It must be robustly supported by multiple independent lines of evidence.
A scientific Theory is not just some unproven idea about something. If you ever come up with something that manages to attain the status of a scientific Theory you're looking at a likely Nobel.