What cognitive goods do children plausibly have a right to in an education? In attempting to answer this question, I begin with a puzzle centred around Joel Feinberg's observation that a denial of certain cognitive goods can violate a child's right to an open future. I show that propositionalist, dispositionalist and objectualist characterisations of the kinds of cognitive goods children have a right to, run in to problems. A promising alternative is then proposed and defended, one that is inspired in the main by Wittgenstein's 'hinge' epistemology as developed in his posthumous "On Certainty."