Experiment is the sole judge of the validity of any idea.

To test whether you have learned an idea or a definition, rephrase what you just learned without using the new word.

The fundamental principle of science, the definition almost, is this: the sole test of the validity of any idea is experiment.

You know how it always is, every new idea, it takes a generation or two until it becomes obvious that there's no real problem. I cannot define the real problem, therefore I suspect there's no real problem, but I'm not sure there's no real problem.

There is no authority who decides what is a good idea.

Science is a process for learning about nature in which competing ideas about how the world works are measured against observations.

But logic is not all, one needs one's heart to follow an idea.