That is a wrong conclusion.

You are testing two different lists independently of each other, the two lists are not iterated over jointly. A ‘false’ only tells you that at least one of these tests failed. And a ‘true’ tells you both tests succeeded. Nothing more, nothing less.

In your example the only thing one can deduce when looking at the last two cells is that ’1961' is not in ‘year’, while ’1962' is.