>>< snip >
>>>----------
>>>(*) The only correct answer to "who forgot to turn off the light" is "everybody", because if at least one person had remembered, the light would have been turned off.
>>
>>It's not correct answer at all.
>
>"Everybody" is sure overrated. More precise answer would be "all of the suspects", i.e. "every one of those who could/should have, but didn't". And the people intuitively go for this restricted meaning.

Nope, the correct answer is: Nobody, unless proven otherwise. :)