A key aspect of self-forgiveness is that one needs to acknowledge one's failings and their consequences. The present study used the Implicit Relational Assessment Procedure (IRAP) and an explicit IRAP analog measure to examine (1) responding to perceived failure following exposure to an insoluble task, and (2) the effect of a defusion intervention on responding in this context. Participants (n = 29) were first assessed for baseline performance on an IRAP and IRAP analog that assessed participants in terms of perceived relations between performance (success vs. failure) and feelings (positive vs. negative). They were then exposed to the insoluble task, after which they were asked to report on their performance and their feelings in relation to the task. They were subsequently assigned to hear either a defusion (n = 14) or control (n = 15) audio recording and were reexposed to the implicit and explicit measures. IRAP results showed significant denial of failure as leading to positive feelings for both groups following the insoluble task, whereas the explicit (IRAP analog) measure failed to show any comparable effect of this task. As regards the defusion intervention, no effect was seen at the implicit level whereas effects at the explicit level were ambiguous. Results and future directions are discussed.