The abstract clearly points out that the observed (negative) effect is stronger for low performers and women.<p>Furthermore, Yegge&#x27;s rant is a bit short on actual facts that would show possible effects. For example, did his career changes happen due to increased pot consumption at the time? Did he abandon his PhD plans because of it? Did he even smoke before high school (at the age of 11)? We don&#x27;t know.