There's no ryhme or reason to her behavior.

What's the meaning of this sentence.

1.You have no reason or pattern why they act like this?

2. They shouldn't act like this because unacceptable?

Question

There's no ryhme or reason to her behavior.

What's the meaning of this sentence.

1.You have no reason or pattern why they act like this?

2. They shouldn't act like this because unacceptable?

Answer

There is no logic to the behaviour. 'Rhyme or reason' is an idiomatic expression to mean 'logical underpinning'.

Answer

It means her behavior defies explanation.