 Dretske (1986) therefore modifies his proposal and maintains that a creature that is capable of representing determinate content must be capable of learning any number of new epistemic routes to the same distal feature. In that case, he says, there is no closed disjunction of more proximal stimuli that the representation could count as representing. He speaks of conditioning in this context. The relevant representation is recruited by conditioning to indicate the distal feature rather than the disjunction of more proximal features, because there is no finite time-invariant disjunction of more proximal stimuli that it has the function of indicating. However, it is controversial whether the presence of such a learning mechanism would, in fact, solve the distality problem (for discussion, cf. Loewer 1987 and the exchange between Garson 2019b and Schulte 2022).