Scientific Law, Theory, and Hypothesis

There are three terms in science that defines knowledge. In today's TOK class, we discussed about differences of law, theory, and hypothesis.

Law:

The term law is given to knowledge that are always true. Law cannot ever be proven wrong. However, in any cases, if a 'law' is proven wrong, every theories that were based on the law will be wrong like domino effect. It is accepted universally and all of the theories are based on a law. 

Ex) The law of gravity

Theory

A scientific theory consists of one or more hypotheses that have been supported with repeated testing. Theories are one of the pinnacles of science and are widely accepted in the scientific community as being true. To remain a theory, it must never be shown to be wrong; if it is, the theory is disproven. Theories can also evolve to become more 'complete', accurate theory.
Ex) The Big Bang Theorem

Hypothesis

A hypothesis is a reasonable guess based on what you know or observe. It is always  proven wrong or true. In scientific discovery, hypothesis plays a big role as theory is based on hypothesis and further laws are discovered due to simple hypotheses. 
Ex) If a prisoner learns a work skill while in jail, then he is less likely to commit a crime when he is released.