We then run the machine learner again, with this new feature relative:  Table 3: Precision, Recall and F-measure of classifier (second run) relative to human judgement.
• The ratio of the test-set probability (from the first run) to the highest of the 8 test-set probabilities for the different formulations of that sentence: probabilities for acceptability are normalised such that the best score for a given propositional content is 1 and the other 7 formulations score less than or equal to 1.