In vat-English sense (i), 'I am a brain in a vat' would be false because a brain in a vat would never have perceptual experiences as of being a brain in a vat

The important fact for Putnam’s argument is that whichever of these possible meanings is had in vat-English by ‘I am a brain in a vat’, that sentence, as used by a BIV, will be false. We saw that in sense (i), ‘I am a brain in a vat’ would be false in vat-English, since a BIV would never have (perceptual) experiences as of being a BIV. Putnam does not explain why ‘I am a brain in a vat’ would be false in both senses (ii) and (iii). Brueckner (2016: 4) suggests that since in sense (iii) both ‘bra