The key to a successful future will be to maintain the best of Castro's legacy while discarding the worst.
But they show an artist changing course, taking some ideas while discarding others, and this is exciting.
Labour needs to separate what Blair got right from what he got wrong, to hold on to the one while discarding the other.
Even the rebels who challenge established states are in confusion, pursuing unrealistic objectives while discarding rules that once limited political violence, an ominous combination.
What is certain is that for MPs to pick out the bits they leave while discarding the rest is a non-starter.
Gradually, the band added pop tunes like "Come on Baby, Let the Good Times Roll" to its repertory, while discarding the old military marches like "Washington Post".
It's when we form an opinion, and then we systematically look for evidence to support that opinion while discarding anything that contradicts it.
The Rangers are banking on his returning to the on-ice agitator role he perfected in his last stint here, while discarding the off-ice dramas that poisoned his time in Dallas.
He squashed it because there was not much upside in acquiring two reserves while discarding a player who might become a catalyst for the team with the best record in baseball.
Some voters have sought to apply a standard in which players are given full credit for statistics they compiled during seasons in which they were not suspected of steroid use, while discarding or discounting those in which they were.
When Moyes was appointed as Sir Alex Ferguson's successor at the close of last season he brought in his own coaches – Steve Round, Phil Neville, Chris Woods, and Jimmy Lumsden, and also appointed Ryan Giggs – while discarding the existing backroom staff of René Meulensteen, Mike Phelan and Eric Steele.
