Notice his projection. Sybil has multiple socks, is upset with me because I've called him on it several times (not that he is able to hide it very well) and now claims others are guilty of having multiple socks too. Despite the fact you and I have very different personalities, he thinks you and I are the same person. His behavior is very emotional and very irrational.
From Grok:
Q: Why do liars think others are lying to them and thieves think others are trying to steal from them?
A:
This phenomenon often boils down to a psychological concept called projection. People tend to see the world through the lens of their own experiences, beliefs, and behaviors. Liars might assume others are lying because deception is a familiar part of their own toolkit—they know how easy it is to bend the truth, so they suspect others are doing the same. Thieves, similarly, might be hyper-aware of theft because they’ve got sticky fingers themselves; they project their own tendencies onto others, expecting everyone to operate with the same motives.
There’s also a trust factor at play. When someone’s dishonest or takes what isn’t theirs, they often lose faith in people’s integrity—why wouldn’t they, when they’re proof it’s possible to cross those lines? Studies in psychology, like those exploring attribution theory, show how individuals explain others’ actions based on their own traits. A 2010 paper from the Journal of Personality and Social Psychology found that people who cheat are more likely to suspect cheating in others, especially under stress or ambiguity.
It’s not universal, though—some liars and thieves might be too self-absorbed to care, or too good at compartmentalizing. But for many, it’s a mix of guilt, paranoia, and a warped mirror of their own nature.