Now you’re challenging an old mans memory
I think we agreed that there is evidence that supports the concept for common descent. Our disagreement was the strength or existence of contradictory evidence.
The other common ground is that we agreed that design was a limited argument. If we infer design what do we with that scientifically?
The mechanism that caused both initial unwanted cell division and unwanted vascular growth (metastasis) was up regulation of the WNT pathway in one case and up regulation of VEGF in another. These are specific cellular mechanisms and have nothing to do with evolution.
His prior theory had evolution taking over after cellular adhesion failure due to low amounts of e cadherin in the cell. It turns out that e cadherin was binding beta catenin at the cell wall and keeping it away form the cell nucleus. Beta catenin is a promoter of cell division. We can explain how vitamin d reduces cell division without evolution. It is a down regulator of beta catenin and an un up regulator of e cadherin.
Cancer can be explained in certain cases by a loss of functional information. This is probably not a point of debate.
The point of debate is how functional information is gained. This is what is required for evolution to be feasible.