Philsophically speaking, what is circular thinking that is not "viscious"?

Question

Circular reasoning is considered "viscious" (philosophically speaking) because it goes round and round and round but never [blank.] If it is not "viscious," it [blanks.]

Answer 1

An example of circular thinking could be ... I'm so depressed that I don't have the energy to make things better, and I don't have the energy to make things better because I'm so depressed.

Answer 2

stops

Answer 3

"Viscious" circularity never stops going around because there is no logic to stop it.

Circularity that is not "viscious" can be stopped by outside influences, such as other known facts, data, truths, which interrupt the circularity.