1. Sounds like he designed and interpreted a study to find what he wanted to find. Everything else is speculation.

2. 15% less likely? Out of a total of 95 colorectal cancer cases? From a universe of 10,000 people, followed for 17 years? Miniscule effect, impossible to draw ANYTHING from that. Besides, why only 15% less risk? If a vegan diet is so perfect,

3. It was based on what people SAID they ate. Not anything they measured or observed.

4. Sounds like he designed and interpreted a study to find what he wanted to find. See a lot of this nowadays.