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
Mladenka	-	Croatian, Serbian
Emery	EM-ə-ree	English
Kaley	KAY-lee	English (Modern)
Cai (2)	-	Welsh Mythology, Arthurian Romance
Ron	[rɔn]
Giannis	YAH-nees	Greek