Time travel paradoxes

Time travel paradoxes involve contradictions that arise when changing the past affects the present or future, potentially creating logical inconsistencies. A common example is the "grandfather paradox," where someone travels back and unintentionally prevents their grandfather from meeting their grandmother, which would prevent the traveler’s own existence. This leads to a contradiction—if they don't exist, how could they have traveled back? Paradoxes highlight challenges in understanding how time travel could work without causing logical impossibilities, raising questions about the nature of causality, consistency, and the structure of reality.