After a failure, have you heard a person claim that the idea was not their best one and that they have another one ready to try?  I think this is brilliant.  If after a failure you have a better idea (even if it appears to be saving face or facilitating ones ego) is the sign of engagement.  I worry when there is not better idea after a a lack of success.  With additional data and insight gained from a failure a fresh reconfiguration of strategy is the sign of energized engagement.  Get excited about the ‘new’ best idea, not immediately dismissive.  Does your enterprise embrace a better best idea or is it met with cynicism?