By the ‘informed breadth’ of a term I shall mean all the real objects of which it is predicable with logical truth in the supposed state of information as our knowledge is never absolute but consists only of probabilities that all the information at hand must be taken into account and those things of which there is not on the whole reason to believe that the term is truly predicable are not to be reckoned as part of its breadth.
http://www.commens.org/dictionary/entry/quote-chap-xi-logical-breadth-and-depth-4