Larger sets than pairs

Most of the adjectives discussed have been ones that come in pairs, though I pointed out that synonymy is not restricted to pairs. Another sense relation that holds between the meanings of sets of words that can be larger than pairs will be introduced. It is called incompatibility. In advance of that discussion it should be noted that some adjectives with apparently interesting interrelationships in meaning occur in sets of more than two; for examples, see (2.25).

If one is truthfully told that a particular rock is yellow, then it follows that it is not any of the other colors listed in the first set of (2.25). Is this blindingly obvious? Is it not always true that if something is said to have one property, then it does not have others? No, that only holds within such sets: a yellow rock could perfectly well be triangular, and, it could be the previous, current or next specimen in a batch being examined by a geologist