However, Equation 26 is a sum rather than a product, so I scale the trans parameters logarithmically, to be consistent with its probabilistic interpretation: Yarowsky (1993, 271) has shown that "for several definitions of sense and collocation, an ambiguous word has only one sense in a given collocation with a probability of 90-99%."
a single contextual clue can be a highly reliable indicator of a word's sense.