We’ve all met these people — someone whose personal (sometimes extensive, often work-related) experience and/or prior dealings with you have led them to the conclusion that they know you, to the degree where they can predict your actions or know your thoughts without ever having to ask.
Which means they get things wrong almost all the time, sometimes to deleterious effect, but due to no one ever wanting to disclose real, personal information to them, they never find out. Sort of like a psychological/emotional manifestation of the Dunning-Kruger effect.
We don’t have a word for this, to my knowledge, so here goes: they should be known as the
What do you think?
Someone whose belief in their own powers of deduction (esp. due to experience) transcends the need to ever ask.