The bare statistic is bleak: Coventry City are only the second team in Premier League history to lose their first four games of the season without scoring in any of them. “And yet …” will be the enduring message from Frank Lampard. And yet they have caused problems for opposition teams – even at points when down to 10 men here against Brighton. And yet they have already faced three of the top flight’s European contingent. And yet they are not playing that badly. But they simply cannot find the…