For the Blues, school is always open because the lessons keep coming and occasionally they are delivered with a rap over the knuckles, this time from the Hurricanes, who showed at Eden Park that you need more than grit to win.
Taking inspiration from the vocal leadership of skipper TJ Perenara, the visitors, on track for a home quarter-final after their 22-12 win, proved that taking your scoring opportunities – whether finishing those presented to you or creating them out of nothing – helps, too.
There was a physicality and intensity from the Blues that showed they wanted to follow through with their promise of putting the previous week's disappointment against the Brumbies in Canberra right, but while they tackled, cleaned out and scrummaged superbly against the visitors, they didn't have the attacking edge required to cut down the second best team in the competition.
The Hurricanes were under siege in the first quarter of the second half; trapped on their line in a series of scrums which were dominated by the Blues and which forced the sinbinning of prop Jeff Toomaga-Allen, yet they somehow wriggled out of the danger and although they conceded a try soon after to Dalton Papalii in the right corner, a remarkable effort from the flanker, Beauden Barrett released the pressure with an intercept try from 50m out.
Halfback Sam Nock scored his first try at this level for the Blues in the first half – a good reward for their dominance – but while they got close at least four other times through Ma'a Nonu, Scott Scrafton and two lineout drives, they couldn't get the ball down.