Chidi reports having seen something which Michael declares to be the "time-knife", to which Chidi exclaims "I saw the time-knife" as if it was some non-visualized abstract concept he was already acquainted with. This leads me to ask: what is the time-knife as referenced in the show?
- Is it a real concept in physics, philosophy, or some other real-world discipline?
- Is it some sort of cultural reference?
- Is it an in-joke?
- Is it just some invention of the scriptwriters to give Chidi something to freak out over?