As if you cared at this point that there could be more than one. As if it made the slightest amount of difference. Don't even get me started about how most people who want help are not the kinds of people who understand these kinds of arcana. Or that even advanced users, programmers with PhDs in Computer Science who know all about full text indexes, would not be able to figure out what they are really being asked to choose from. Asking the user to make a decision isn't in itself a bad thing.
Freedom of choice can be wonderful.
People love to order espresso-based beverages at Starbucks because they get to make so many choices . The problem comes when you ask them to make a choice that they don't care about . In the case of help files, people are looking at the help file because they are having trouble accomplishing something they really want to accomplish , like making a birthday invitation. Their birthday invitation task has been unfortunately interrupted because they can't figure out how to print upside down balloons, or whatever, so they are going to the help file. This second level of interrupting is completely unrelated to birthday invitations, and it's simply guaranteed to perplex and eventually piss off the user.