(false as for example in space, up and down are undefined, but a valid scientific theory). Only a theory that can be falsified by observations can be a scientific theory. Accepted scientific theories are the ones that have not been falsified despite much efford. read more
A scientific theory is an explanation of an aspect of the natural world that can be repeatedly tested, in accordance with the scientific method, using a predefined protocol of observation and experiment. Established scientific theories have withstood rigorous scrutiny and embody scientific knowledge. read more