I was surprised by the business with the speaker trying to get Ian Blackfrord to pretend that he believed that Boris Johnson had been "inadvertant" in saying stuff that was untrue to the House. I knew there was a rule against using the word "lie", but I'd always taken it that, if phrased properly, it was in order to make the accusation.

That is irrational. If it has be accepted that lying cannot have taken place, how can it be that a minister who lies must resign, since it is officially impossible for them to do so.