Because the sort of questions we get in this thread don't require anyone posing them to be a a novice in the way of rationality (or any field, really). Going over the previous thread, you'll notice some questions that are explicitly about learning rationality or explanations about it, but most are general topic questions.
This thread is for asking any questions that might seem obvious, tangential, silly or what-have-you. Don't be shy, everyone has holes in their knowledge, though the fewer and the smaller we can make them, the better.
Please be respectful of other people's admitting ignorance and don't mock them for it, as they're doing a noble thing.
To any future monthly posters of SQ threads, please remember to add the "stupid_questions" tag.