This theory (that would prove Greg is more than just a super tall drink of water), is based on things Kendall says to Greg aboard the family yacht that would tie in nicely with the second oldest Roy boy having paper evidence that Greg saved from Tom Wambsgans destroying in the fire pit on the balcony.

One redditor writes, “When the fam first arrives at the yacht and Greg is talking about the boat, Ken cryptically asks him, ‘Are you having reservations?’ He later shouts to Greg ‘Are you ready to step up, Greg?' Watching the two of them together in the episode made it clear to me that they hatched this plan ahead of time.”