How does knowing that ortho refers "correct" and dox refers to "opinion" clarify the meaning of the word orthodox?

What did economist john maynard keynes believe about deficit spending?

According to the federal regulations, human subjects are living individuals about whom an investigator conducting research obtains information through interaction or intervention with the individual, and uses, studies, or analyzes the information; or:

Apolitical system in which everyone has a personal say in what a government does is called a