Some comments on Moore's "envelope" argument
Abstract
In the sketch of his (discontinuous) envelope argument in his Some Main Problems of Philosophy (Macmillan: 1953), Moore treats the various phrases, "appears to be," "appears like a thing would appear if it were presented in a certain way," as though they were synonymous. Austin, in the fourth chapter of his Sense and Sensibilia (Oxford: 1962), tries to call to our attention the fact that these philosophically favorite phrases are not interchangeable; as a result, if an argument is begun by using one phrase and then a different one is substituted without argument, the person equivocates and the argument fails.