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2 total sentences available.
So a law of nature which said, say, that Ravenhood is causally linked with blackness would entail both All ravens are black and All non-black things are non-ravens, but would not entail a law linking non-blackness with non-ravenhood.
Source: wiktionary
If this could be shown, the above statement would be systematically related to other statements about ravenhood in particular and the genetics of feathered creatures in general.
Source: wiktionary
Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.