What word means when two ideas are used to prove each other?

Answer 1

It is sometimes called a circular argument or circular reasoning. Aristotle called it petitio principii. It is also called "begging the question" (a translation of Aristotle's term, which is itself a translation to Latin from the Greek) , an expression a number of people misuse because they do not understand it. A typical question-begging argument is: Everything in The Bible is true, and this is proven because it says so in the Bible. And it is true when it says something in the Bible because everything in the Bible is true. The two ideas are used to justify each other. Another example is: Muslims are terrorists. We know because every time we hear about Muslims they are being terrorists, because terrorists are always Muslims. And we know that because every time we hear about terrorists, we are told they are probably Muslims, because Muslims are terrorists.

Answer 2

words used in a speciality area