The scientific method is a phrase Musk uses often…
1. Ask a question.
2. Gather as much evidence as possible about it.

3. Develop axioms based on the evidence, and try to assign a probability of truth to each one.
4. Draw a conclusion based on cogency in order to determine: Are these axioms correct, are they relevant, do they necessarily lead to this conclusion, and with what probability?

5. Attempt to disprove the conclusion. Seek refutation from others to further help break your conclusion.

6. If nobody can invalidate your conclusion, then you’re probably right, but you’re not certainly right.
“That’s the scientific method,” Musk concludes. “It’s really helpful for figuring out the tricky things.”…

http://www.rollingstone.com/culture/features/elon-musk-inventors-plans-for-outer-space-cars-finding-love-w511747