a chicken and egg situation

a situation in which it is impossible to say which of two things existed first and which caused the other It's a chicken and egg situation - I don't know whether I was bad at the sciences because I wasn't interested in them or not interested in them and therefore not good at them.

Common Names:

Name	Pronounced	Usage
Esau	EE-saw (English)	Biblical, Biblical Latin, Biblical Greek
Enid	['i:nid]
ŞAhnaz	-	Turkish
Ashworth	['æʃwɜ:θ]
Jovian	-	Ancient Roman (Anglicized)
Aline	[æ'li:n]