In discussing the paradoxical violation of expected utility theory that now bears his name, Maurice Allais noted that people tend to “greatly value,” or overweight, outcomes that are certain. Digging deeper, the Principal Investigator draws on the more recent work of Andreoni and Sprenger on a Discontinuous Preference for Certainty and show that that impact of the rebate framing on willingness to pay for insurance is driven by individuals who exhibit a well defined discontinuous preference for certainty.