Recently I've started reading about Time Travel after watching it in Harry Potter and the Prisoner of Azkaban. There is a line on this subject in the Wikipedia page on 'Causal Loop' i.e.
The term "time loop" is sometimes used to refer to a causal loop, but although they appear similar, causal loops are unchanging and self-originating, whereas time loops are constantly resetting.
The above highlighted idea is present in various other articles as well in slightly different words. However, everywhere it's just this line and then full stop. No explanation. No elaboration.
Can anybody explain what this statement really means?