 Bauckham argues that Mark's content is limited to what Peter himself had witnessed, or at least learned from trusted associates.Powers argues that Mark's purpose is fundamentally kerygmatic, needing to hold the attention of outsiders hearing the Gospel preached for the first time, so he focused on who Jesus was and what he did, eschewing the sort of lengthy teachings that dominate the double tradition and most of Special Matthew.So, with Mark's selection process better understood, his omissions per se are no longer viewed as such compelling evidence for Marcan priority.