"First, there is intensionality, which is the 'aboutness' of our thoughts." (source section 15). "the 'aboutness' of something from the inner or mental state seems to require, or at the very least, presuppose, an outer or external state" (source section 23) "All of these [senses of intentionality] focus on the relation between ourselves and 'the other'". (source section 15)