ABSTRACT
Sense-data may remain largely out of philosophical fashion, but the metaphor of phenomenal space continues to mislead, for, as we have seen (§§1.2, 1.4, 4.3), sense-data comprise only one answer to Moore’s question of how phenomenal space is related to physical space-a question that itself is provoked by taking the metaphor literally. Thinkers like Schlick, Carnap, and Wittgenstein himself, before October 1929, all rejected the act-object analysis that leads to sense-data, but they continued to wonder how these two distinct “spaces” might be related. Such “sense-datum free” treatments of phenomenal space persist today in the form of talk about qualia , consciousness, and the subjective character of experience.
