circumstantial
Note by H Craik to chapter 2 of Tale of a Tub

Seems (besides its technical meaning as applied to evidence) to be used in two distinct senses — viz. to describe either, something which deals only with accidental and unimportant incidents; or, something which commands belief from the fulness and exactness with which it treats of details and incidents attending an occurrence. The latter is the common usage in our day: Swift here uses the word in the other sense, which seems now to be obsolete.