which is which

idiom

used to say that one is unsure about the identity of each member of a group
One of the twins is named John and the other William, but I don't know which is which?

Examples of which is which in a Sentence

Recent Examples on the Web In modern versions of the test, a human judge typically talks to either another human or a chatbot without knowing which is which. Benj Edwards, Ars Technica, 1 Dec. 2023 Teach them that there are people who stay and some who go, and that titles don’t say which is which. Carolyn Hax, Washington Post, 20 Dec. 2023 Human judges hold text conversations with two hidden interlocutors, one human and one computer, and try to determine which is which. WIRED, 10 Aug. 2023 The color-blind friend hides the two behind her back, possibly mixing them up, presents them, and the friend with better vision says which is which color. Ben Weiss, Fortune Crypto, 5 June 2023

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'which is which.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Dictionary Entries Near which is which

Cite this Entry

“Which is which.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/which%20is%20which. Accessed 18 Jun. 2024.

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