This paper proposes a paradigm shift in the interpretation of quantum mechanics, reframing wavefunction collapse as cognitive selection. Prevailing interpretations of quantum mechanics—such as the Copenhagen interpretation, Many-Worlds, and objective collapse theories—assume that quantum superpositions resolve into singular outcomes via measurement or branching realities. This paper posits an alternative hypothesis: quantum superpositions exist within a single universe, but our perception filters and stabilizes a single outcome. To test this hypothesis, a modified delayed-choice quantum eraser experiment is proposed, introducing observer delusions to determine whether wavefunction collapse is influenced by an observer’s belief about which-path information, rather than its mere physical recording. This framework bridges quantum mechanics, neuroscience, and artificial intelligence, offering a falsifiable alternative to existing interpretations. If validated, this hypothesis would expand our understanding of the observer’s role in quantum mechanics.