So there would be someone to blame for her mother's leaving
The allegory contains many forms of symbolism used to instruct the reader in the nature of perception. The cave represents superficial physical reality. It also represents ignorance, as those in the cave live accepting what they see at face value.
They must not base their conclusions on a.opinions
It is the Both texts tell the reader of the uncertainly, but Spiegelman shows it with images as well.