Calcutta Cup crucible can reveal real England and test Scotland resurgence | Robert Kitson

England’s winning run has not wholly banished doubts about their standing under Eddie Jones but the picture should be clearer after a keenly anticipated Murrayfield showdownSeveral lively debates are currently raging around English rugby. Some reckon the national team is starting to plateau and, despite a striking win-loss ratio under Eddie Jones, could be vulnerable to a chilly blast of reality at Murrayfield on Saturday. Others argue that is nonsense and insist world domination is imminent. By Saturday evening the truth should be much clearer.Part of the problem is that sporting beauty is in…