Epigenetic tags are inheritable, yes, but when they're expressed and to what extent the epigenetic tags are expressed changes between individuals. Since expres

Epigenetic tags are inheritable, yes, but when they're expressed and to what extent the epigenetic tags are expressed changes between individuals. Since expression of these tags result from external influences, I don't see what the relevance is. Can you explain? How does inheritance of these epigenetic tags, unexpressed, contradict the article?