therein lies the problem

: in or into that place, time, or thing

: in that particular or respect

: to be or to stay at rest in a horizontal position : be prostrate : rest, recline

: to assume a horizontal position

: to reside temporarily : stay for the night : lodge

: lay

: the position or situation in which something lies (see ¹lie)

: the haunt of an animal (such as a fish) : covert

: to make an untrue statement with intent to deceive

: to create a false or misleading impression

: to bring about by telling lies

: an assertion of something known or believed by the speaker or writer to be untrue with intent to deceive

: an untrue or inaccurate statement that may or may not be believed true by the speaker or writer

: something that misleads or deceives

: a question raised for inquiry, consideration, or solution

: a proposition in mathematics or physics stating something to be done

: an intricate unsettled question

: dealing with a problem of conduct or social relationship

: difficult to deal with