The two experts had not consulted each other, yet their conclusions were exactly the same; great minds really do think alike.
Tips
usage
Usually said with a smile when someone reaches the same idea as you, a joking way to praise both of you at once. It goes back to a remark of 刘备 quoted in the notes to the 《三国志》: the wise men of the world 所见略同, 'see things much alike'.