I find it very depressing that semantics and definitions of fairly common-sense words are at the center of this particular set of weaseling.
In this case, as the parent points out, this is entirely the wrong way to ask the question.
You don't ask them whether they did X, you ask them what information they have, and then for each piece of information, how was it acquired.
Bill Clinton got away with the Monica comment about sex and so will the next bunch about something different.
Side note: his predecessor had a long-time mistress that was well known to beltway insiders. The Right changed the rules once they were out of power.