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Time travel in modern fiction is sometimes achieved by space and time warps, stemming from the scientific theory of general relativity. [9] Stories from antiquity often featured time travel into the future through a time slip brought on by traveling or sleeping, in other cases, time travel into the past through supernatural means, for example brought on by angels or spirits.
McTaggart argued that the description of events as existing in absolute time is self-contradictory, because the events have to have properties about being in the past and in the future, which are incompatible with each other. McTaggart viewed this as a contradiction in the concept of time itself, and concluded that reality is non-temporal.
Reality can be defined in a way that links it to worldviews or parts of them (conceptual frameworks): Reality is the totality of all things, structures (actual and conceptual), events (past and present) and phenomena, whether observable or not.
Examples in continental philosophy of philosophers raising questions of temporality include Edmund Husserl's analysis of internal time consciousness, Martin Heidegger's Being and Time, J. M. E. McTaggart's article "The Unreality of Time", George Herbert Mead's Philosophy of the Present, and Jacques Derrida's criticisms of Husserl's analysis.
Hyperreality is significant as a paradigm to explain current cultural conditions. Consumerism, because of its reliance on sign exchange value (e.g. brand X shows that one is fashionable, car Y indicates one's wealth), could be seen as a contributing factor in the creation of hyperreality or the hyperreal condition.
Examples include the Dream Cycle stories by H. P. Lovecraft or the Thomas Covenant stories of Stephen R. Donaldson. Often, stories of this type have as a major theme the nature of reality itself, questioning whether the dream-world is as real as the waking world. Science fiction often employs this theme in the ideas of cyberspace and virtual ...
A notable example is found in the TV series Doctor Who, where a character saves her father in the past, fulfilling a memory he had shared with her as a child about a strange woman having saved his life. The predestination paradox raises philosophical questions about free will, determinism, and the nature of time itself.
Metaphysics is the study of the most general features of reality, including existence, objects and their properties, possibility and necessity, space and time, change, causation, and the relation between matter and mind.