I believe it was a rhetorical question intended to illustrate the ease and frequency with which Prime Minister lies to you, and the lack of consequences such lying attracts.To whom are you addressing that question?
For example:
In your sovereign parliament, Johnson states:
“I will not be requesting any extension to A50 from the EU.”
Just a few hours later:
Boris, what have you just done?
“I’ve just requested an extension to A50 from the EU”
And then the press forget to take him to task over it and focus on “plots to wreck Brexit”
that’s the sort of thing.