Hermione decided to ignore that.  It wasn’t that she didn’t agree.  She’d already written the man a Howler filled with words she didn’t usually use. Not just "irresponsible’ and "careless’ and "didn’t you take your potions?’ but "you bloody halfwitted wanker’ and "if she dies I will personally track you down.’  He’d written back that he had taken them, or most of them.  It had been a ten-day course, and they’d upset his stomach, and he’d felt fine so he’d stopped after seven days.  He hadn’t had a single symptom, and his stomach, and surely she understood, no?  He’d been sure it had been enough.