Professor McGonagall spent some time apologetically talking with them about prejudices against Muggle-borns amongst certain segments of wizarding society, and gave a very brief history of the war with You-Know-Who, and Mr Granger forgave her for the unintended insult once she explained herself better. But while they were willing to be wary of Mr Nott, neither he nor his daughter could be persuaded to consider giving up her new acquaintance, so she quickly gave up her attempt with another apology before dropping the discussion entirely.