> but I find it difficult to swallow as a universal rule
But the author doesn't claim it's a universal rule, the author claims that the rule applies generally. Good thing to think about the cases it doesn't apply, but the author did put it in a proper way to express this.
But the author doesn't claim it's a universal rule, the author claims that the rule applies generally. Good thing to think about the cases it doesn't apply, but the author did put it in a proper way to express this.