This is a paraphrasing task. In this task, you're given a sentence and your task is to generate another sentence which express same meaning as the input using different words.

if you know that something is false , how can you trick yourself into believing it is n't ?
if you know something is n't true , how do you fool yourself that 's true ?

he had saved mrs. lestrange from having to give evidence at the inquest .
he saved mrs. lestrange saying she did n't have to give evidence in a court investigation .

incidentally , can squibs see dementors ? ' he added , looking left and right along the bench .
by the way , can twos see the dementors ? '' he added , looking to the right and left .