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Life

Humble fruit fly can make its own decisions

By Bob Holmes

16 May 2007

FRUIT flies have free will. Even when deprived of any sensory input to react to, the zigs and zags of their flight reveal an intrinsic, non-random – yet still unpredictable – decision-making capacity. If evolution has furnished humans with a similar capacity, this could help resolve one of the long-standing puzzles of philosophy.

“Even when deprived of any sensory input to react to, fruit flies reveal an intrinsic decision-making capacity”

Science assumes that effects have causes, and that if we understand the causes well enough we can predict the effects. But if so, our experience of being free to make choices is…

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