First,it is of course possible that distinct states of affairs A and B may be joined under a concept, as the established correlation between the insertion of sharp objects into tyres and the deflation of those tyres is brought under the concept 'puncture'.It would be tedious to labour the point that while the usefulness,and no doubt the existence, of the concept depends on the existence of the correlation, the existence of the concept does nothing to guarantee the continuation of the correlation.