which is which

which is which  {n. phr.}
Which is one person or thing and which is the other; one from another; what the difference is between different ones; what the name of each one is.
Joe's coat and mine are so nearly alike that I can't tell which is which.
Mr. Hadley hadn't seen his friend's daughters in such a long time that he couldn't remember which was which.
Categories: noun time

An client error occurred: Error calling GET https://www.googleapis.com/youtube/v3/search?part=id%2Csnippet&q=%22which+is+which%22&maxResults=4&videoEmbeddable=true&videoSyndicated=true&safeSearch=strict&type=video&key=AIzaSyCfLRuAZZNAQm6a5uDzgY-Tt668bxsppCs: (403) The request cannot be completed because you have exceeded your <a href="/youtube/v3/getting-started#quota">quota</a>.