which is which

1. What particular one is what particular one, or what is the difference between different ones. For example, These twins look so much alike I can't tell which is which, or Both our raincoats are tan; do you know which is which? This idiom was first recorded about 1412.

Example Sentences

“There's a lot of misinformation, but I do think there is a lot of good information out there, and it's just that it comes to a point when it's very difficult to separate which is which,” he said.

Read more on Salon

"You've got to do your research and really study and master the craft of telling which is which, as it's such a big problem now," said Jacob, who runs Knight Vintage in Cardiff.

Read more on BBC

ABC’s decision to pay Trump and apologize nonetheless is an Orwellian warning that, when covering an ascendent fascist, up will be down and down will be up, and only Trump can decide which is which.

Read more on Salon

The detection process is time-consuming for human observers - but Squirrel Agent uses the power of AI to rapidly analyse all those markers and decide with an extremely high level of accuracy which is which.

Read more on BBC

“The key that I think I’m ― you know, that President Trump has promised me is ― is control of the public health agencies, which are HHS and its sub-agencies, CDC, FDA, NIH and a few others, and then also the USDA, which is ― which, you know, is key to making America healthy. Because we’ve got to get off of seed oils, and we’ve got to get off of pesticide intensive agriculture,” he reportedly said.

Read more on Salon