A chicken-and-egg situation, problem, etc.
Definition 1 of 1

Origin Reference
The phrase refers to the dilemma of which came first, the chicken or the egg, symbolizing a complex causality.

Determining whether good sales lead to good ads or vice versa is a chicken-and-egg situation.
Not Literal
This phrase is not used to describe actual chickens or eggs; it's metaphorical for unsolvable dilemmas.

Choosing between job experience or education is often a chicken-and-egg situation for graduates.
Conversation Starter
It's often used to start a discussion about complex issues with no clear starting point.

Is technology driving social change, or is it the other way around? It's a chicken-and-egg situation.
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