They're talking about things of which they don't have the slightest understanding, anyway. It's only because of their stupidity that they're able to be so sure of themselves. The Trial

The man who deceives shows more justice than he who does not Gorgias

I often ardently perceived a longing for relief, the desire for a proper confession, but I also felt in advance that I would be unable to tell and explain things correctly to either my father or mother. I knew that they would receive my words amicably, they would carefully spare my feelings, in fact, pity me, but they wouldn’t fully understand me, and the whole thing would be looked on as a sort of minor infraction, whereas it was actually my fate. Demian

Nothing is so firmly believed as that which we least know. Essays