The Vampire Diaries is a show that asks its viewers to suspend disbelief when it comes to vampires, werewolves, ghosts, and hybrids — and we happily do so! But that doesn’t mean there aren’t things about the show that irk us with their irrationality. What were the biggest logic fails in Season 5, Episode 7 (“Death and the Handmaiden”)?

Katherine’s inconsistent aging. Katherine’s aggressive aging seems to be awfully inconsistent — both in terms of duration and symptoms. In one episode, she’s graying and losing teeth in the course of a day. In the next ep, her only symptom is quasi-hemophilia. If she’s set to die in a few months, per Dr. Wes’ assessment, then she’d better hurry up and get arthritis. Then again, we’re never quite sure how time passes in the TVD-verse. That whole episode could have only been five minutes in Mystic Falls for all we know.

No follow-up questions? OK, we know Bonnie and the gang were desperate to bring her back into the world of the living, but why did no one step to ask about any potentially negative side effects to being the anchor to the Other Side? It seemed like a major lapse in judgment for the Mystic Falls gang, especially considering the fact that they had a living, breathing representation of what anchoring can do to a person in crazy-pants Amara.

Dr. Wes Maxfield's disinterest in Katherine. We know Dr. Wes has classes to teach and everything, but could he have been any less interested in Katherine as a fascinating 500-year-old human-to-vamp-to-human specimen? This is the guy who spends his free time turning his research assistants into vampires so he can use them as lab rats. He wasn’t interested in trying to find out more about Katherine’s dealio? She probably would have even volunteered, if it meant potentially saving her life.

Silas takes a bus. We almost left this one off of the list because we adored Silas’ bus-related scenes so much, but it seems crazy that a 2,000-year-old witch would choose to take the bus rather than just liquify a passer-by’s internal organs for use of their hybrid — the car, not the supernatural crossbreed. We know Silas was learning about the Everyman and everything, but he kinda, sorta had somewhere to be and the woman he loved to kill.

Doppelganger blood. We are so far beyond confused about the many uses of doppelganger blood and doppelgangers at this point, but wasn’t there some hubbub in seasons past about how doppelganger blood more-or-less only had immense power when the doppelganger was human? TVD seems to be changing their tune this week with both Elena’s vamp blood meaning something in this week’s TVD and Tyler’s creation of a hybrid sans doppelganger blood in this week’s The Originals. You’re making our brains hurt with your logic reversals, TVD-verse!

Where there any lapses in TVD’s complex internal logic system that really got under your skin in this week’s episode? Sound off in the comments below!

The Vampire Diaries airs on Thursdays at 8 p.m. on The CW.