put two and two together

He told the inquiry: "Because of what happened the following day, I put two and two together and came up with some conclusion that we were probably being followed."

On it, she heard Ms Hartley talk about symptoms she herself had suffered with but had "never put two and two together".

I think there is a delay and when that happens, you put two and two together and you realize that a human brain is not designed to be exposed to this much misery and bloodshed every single day.

Judge Florence Pan, a Biden administration appointee, quickly put two and two together.

Louis Ahearne said this was for "tourist" purposes, but Stewart Ahearne said he "put two and two together" after the burglary.