Blubbers44 posted :-
Just responding to the checklist is another matter that is easy to fall in to. We get bored and keep repeating the same checklists and sometimes just say the words. That is where the problem lies. Saying the response then looking at the actual position. Usually you realise the mistake but the checklist reader may assume what you said was true if he did not verify. Humans are prone to get complacent when doing the same thing over and over.
Once upon a time I thought I had engaged and involved four other people in a calculation - fortunately one with a non-fatal outcome - when it turned out to be incorrect I remonstrated at length only to be told - "Oh, we heard what you said but we didn't bother to actually work it out because we thought YOU knew what you were doing!"