maybe this is obvious but it took me too long to figure out:

if you think yourself the type of person who would never do X, you likely are going to ignore yourself doing X because you have internalized not doing X as an identity (we often struggle to accept reality if it contradicts our identity). accept it as a possibility and you not only will more readily accept having done X should it happen, you will likely be more aware of situations developing that could lead you to do X.