 Two different versions of the No Propositional Knowledge-View have been proposed. According to the Ability Hypothesis (most prominently defended in Lewis 1983, 1988 and in Nemirow 1980, 1990, 2007), Mary does not acquire any new propositional knowledge after release (no knowledge about something that is the case, no factual knowledge), but only a bundle of abilities (like the ability to imagine, remember and recognize colors or color experiences). According to the Acquaintance Hypothesis proposed by Conee (1994), Mary’s new knowledge after release is what he calls “acquaintance knowledge” which is neither propositional knowledge nor identical to a bundle of abilities.