| http://www.w3.org/ns/prov#value | - If by 'failure' you mean that no approach to quantum gravity has proven successful after 30 years, I would point out that 1) this includes both discrete and continuum approaches, so that past 'failures' do not lend support neither to continuum nor to discrete approaches as such; 2) that 'failure' is a misnomer because we have learnt a great deal from all of them (including the one that failed most
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