The core case for a Yes vote on 5 May is that up to one-third of voters now repudiate the binary voting tradition – Tory or Labour (formerly Liberal/Whig - of the past. They seek greater pluralism and choice. To deny this is "unfair" and a "wasted vote". That's a powerful claim which impresses me. Systems are designed to meet human needs.
"There's a lot of sloppy talk going around this country that there should be no place in the concerns of a federal Labor government for the Alan Bonds of this world; I want to repudiate that nonsense unequivocally," he said.
John McCain took to the Senate floor on Wednesday to repudiate suggestions by his fellow Republican lawmaker, Michele Bachmann, that the family of a longtime aide to secretary of state Hillary Clinton had ties to Egypt's Muslim Brotherhood.
But on both left and right, populist parties with simple solutions – "quit Europe", "quit Britain", "keep out the foreigners", "repudiate the debt" – tend to become over-dependent on charismatic leaders who can sell the message to those voters who don't pay much attention to usually-dull mainstream politics and don't much like it when they do.
Thatcher was to go on to put Labour's refusal to condemn the picket-line violence of the militant miners at the very heart of the problem, with influential men prepared to repudiate the ideas of parliamentary democracy and the rule of law.
But no matter how moth-eaten and means-tested their welfare state, how dilute their social democracy, the first world, G7-club British would never publicly repudiate their commitments to the sick, the elderly, the poor.
Next, repudiate the convention and, if need be, leave the Council of Europe.
The Liberal and Progressive parties have grown bolder and are openly canvassing multi-racial solutions for South Africa which repudiate apartheid along with the pass laws, and are nibbling at the holy doctrine of white supremacy.
But if Mr Humala is to allay suspicion about his plans among two-thirds of the electorate, he must repudiate his far-left written manifesto, drop talk of changing the constitution the formula used by Mr Chávez to cling to power and promise to appoint competent technocrats.If Mr Humala arouses fears for the future, Ms Fujimori awakens fears of the past.
At least one candidate, John Edwards, is using the language of the 50 50 nation to repudiate it (he promises to rise above the two Americas, with its two tax systems, two health-care systems and two governments).
In 1996 he ignored calls even from his own supporters to repudiate her racial views.
