Mind projection fallacy, as coined by physicist and bayesian philosopher E.T. Jaynes

Edwin Thompson Jaynes

Edwin Thompson Jaynes was Wayman Crow Distinguished Professor of Physics at Washington University in St. Louis...

, occurs when one takes for sure that the way he sees the world reflects the way the world really is, going as far as assuming the real existence of imagined objects.
Another form of the fallacy is when one assumes his own lack of knowledge about how the things really are as meaning that things are indeterminate.

Jaynes used of this concept to argue against Copenhagen Interpretation

Copenhagen interpretation

The Copenhagen interpretation is one of the earliest and most commonly taught interpretations of quantum mechanics. It holds that quantum mechanics does not yield a description of an objective reality but deals only with probabilities of observing, or measuring, various aspects of energy quanta,...

 of Quantum Mechanics

Quantum mechanics

Quantum mechanics, also known as quantum physics or quantum theory, is a branch of physics providing a mathematical description of much of the dual particle-like and wave-like behavior and interactions of energy and matter. It departs from classical mechanics primarily at the atomic and subatomic...

.