He now discovered that Hume's skeptical analysis of the notion of cause was really the treatment of one typical or crucial instance of the much more general problem.
The imminence of death often intensifies instead of diminishing a man's desire for the welfare of those he loves, as a crucial experiment proving the disinterestedness of love.
The selection of organisms through the crucial test of fitness and the shaping of the organic world is an orderly process when contemplated on a grand scale.
He soon made the crucial discovery - which proved the foundation of the huge industry of artificial alkali manufacture - that the desired end was to be attained by adding a proportion of chalk to the mixture of charcoal and sulphate of soda.
The position of Damascus is a position of crucial importance from 1130 to 1154.