Begging the question is something that I previously discussed on Episode 279: Mailbag — Competitive Edition of the Talk the Talk podcast. It’s a fallacy that has moved into common parlance to the point that it can easily be confused with the literary concept / has moved into vernacular use, rather than strictly following the fallacy as it was initially meant.
It’s a fallacy that is logically inconsistent, and goes back to Aristotle’s Topics. “Asking for the initial thing / asking for the starting point”, or petitio principii. For example:
X is true, therefore it is true.
I know ghosts are true, because I’ve experienced what could only be ghosts.
Or as Daniel Midgley said in that episode of the Talk the Talk podcast, “If you pray about this book and ask god if it is true, he will reveal it with the power of the holy ghost”.
To invite the question or dodge it is a new meaning of a phrase (‘it begs the question, what the hell are we doing here?’), and ambiguity has led to different interpretations.
However you might feel about this, in terms of fallacies, begging the question means that you’re making a claim that is supported by the initial premise — we’re not given any more information that would genuinely support it.