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12056 | An ancestral relation is either direct or transitively indirect [Wiggins] |
Full Idea: x bears to y the 'ancestral' of the relation R just if either x bears R to y, or x bears R to some w that bears R to y, or x bears R to some w that bears R to some z that bears R to y, or..... | |
From: David Wiggins (Substance [1995], 4.10.1) | |
A reaction: A concept invented by Frege (1879). |