As the topics starts off with ... "To concede or not to concede -- that is the question".
Or as in the case of the Solheim Cup, was it poor sportsmanship, gamesmanship on the part of Europe or all a big mistake by the Solheim rookie? 
What do you think TT'ers, and I pose this to the Canadian section as (Canada) was not involved in the competition.  
Should Petterson have conceded it at the point of it occurring?  Have you ever been in a similar situation on either end of a non conceded putt?  
Interested to hear what my fellow TT'ers think?
D