It's not necessary to prove anything to Calbois like yourself. We could produce him on video punting a puppy across the room while yelling "I knew Sharpe wasn't coming back next year" and you people would find a way to justify it.
It's obvious enough based on the preponderance of evidence that there are only two main possibilities:
1. Cal knew and enabled Sharpe's plan to avoid playing here
2. Cal was the only person on the PLANET who didn't know, and that includes Sharpe, the NBA, Kyle Tucker, Sharpe's family and handlers, and a large portion of the fanbase who were calling this (accurately) from the start.
If you really want to hang your hat on the less likely possibility that Cal was just stupid and not simply being given plausible deniability, then you actually should have a more difficult time defending him as an utter imbecile who is easily suckered by 18 year olds and therefore should NOT BE ALLOWED NEAR UK BASKETBALL ever again.