First time I hear about him, but it looks like he is a scientist: https://www.researchgate.net/profile/Josh-Mitteldorf https://www.researchgate.net/profile/Jos

First time I hear about him, but it looks like he is a scientist: https://www.researchgate.net/profile/Josh-Mitteldorf https://www.researchgate.net/profile/Josh-Mitteldorf > Look at how he talks about the "10-20% flexibility". Hypothesis assumed true, no supporting evidence. He started that part with "Here’s my perspective:", so for me it sounded more like his personal opinion/hypothesis, not a scientific consensus (and that hypothesis wasn't the topic of the article, so it's not strange for me that he gave no evidence for it there).