John McTaggart

John McTaggart was a philosopher who explored the nature of reality and time. He proposed that time might be an illusion because past, present, and future can't all be true simultaneously, which leads to logical paradoxes. In his famous "A-series" and "B-series" concepts, he distinguished between different ways of viewing time—one based on changing moments and another on relations between events. McTaggart's work challenges our understanding of whether time is real or just a construct of how we perceive change and sequences. His ideas have significantly influenced metaphysics and the philosophy of time.