 Some words have the effect of widening or narrowing the supposition of other terms in a proposition. For example, by qualifying ‘man’ with the adjective ‘white’, we restrict the supposition of ‘man’ in ‘A white man is running’ to white men; while a verb in the past tense ampliates the supposition of the subject to include what were its supposita. For example, ‘A white thing was black’ means that something which is now white or was white in the past was black.