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constant conjunction are merely accidental and cannot be equated with causation. For example, we might observe sunrise following the crowing of rooster for a long period of time, but it would still be irrational to then believe the crowing causes the sunrise. Along these lines, a more modern conception would argue that
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of certain impressions across many instances, so that causation is merely constant conjunction—after observing the constant conjunction between two events A and B for a duration of time, we become convinced that A causes B. However, this position raises problems, as it seems that certain kinds of
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has confirmed this insight as a product of the activity of synapses and STDP, so structured to strengthen connections between cells that fire within very short periods (tens of milliseconds) of each other. The longer time periods of classical conditioning are presumably a large-number effect of
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within the nervous system to form connections within large cliques of cells whenever those cells fire together within a reasonably short period of time. (A modern shorthand for his ideas states: "Cells that fire together, wire together".) Modern
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is distinguishable from a principle that arises merely accidentally because of the constant conjunction of one thing and another, but there is considerable controversy over what this distinguishing feature might be.
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is a relationship between two events, where one event is invariably followed by the other: if the occurrence of A is always followed by B, A and B are said to be
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The force of Hume's arguments has remained remarkably robust, and they have found unexpected support in three scientific discoveries of the 20th century:
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tried to dissipate the position. Kant was motivated to develop his philosophy by Hume's argument, which he considered to be an attack on science.
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can follow in constant conjunction a conditioning/conditioned stimulus within a timeframe of milliseconds to several seconds, and result in the
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Hume proposed that the origin of our knowledge of necessary connections arises out of observation of the
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philosophers elaborated on Hume's fundamental idea in many diverse ways, and metaphysicians like
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The philosopher David Hume used the phrase frequently in his discussion of the limits of
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Phrase used in philosophy as a variant or near synonym for causality and induction
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having many of the properties of the unconditioned stimulus.
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