H. P. Grice: that we need a concept which is related to that of being sure in the kind of way which 1 have suggested intending is related to being sure; and if we need such a concept we may presume that we have it.

 that we need a concept which is related to that of being sure in the kind of way which 1 have suggested intending is related to being sure; and if we need such a concept we may presume that we have it.