RMB1 Posted June 23, 2011 Report Share Posted June 23, 2011 In some branches of mathematics (e.g. set theory) "null set" means "empty set"; for instance in formulations of the axiom of the empty/null set. In some other branches of mathematics (e.g. measure theory) a "null set" means any set of negligible content (e.g. measure zero). Given that bridge is an essentially discrete realm of discourse, "null set" in this context must mean "empty set". Quote Link to comment Share on other sites More sharing options...
blackshoe Posted June 24, 2011 Report Share Posted June 24, 2011 If you say so, Robin. :) Quote Link to comment Share on other sites More sharing options...
bluejak Posted June 27, 2011 Report Share Posted June 27, 2011 I meant empty set if there really is a difference [angels and pins come to mind]. I did not say that there is no such thing as a bid with no meaning, I said there is no such thing as an impossible bid. For example there was a sequence in London 1NT p 2♣ [stayman] p 6♥. Now, I am not suggesting the pair had an agreement as to what 6♥ meant, but I dislike people calling bids like 6♥ impossible, because they are not, as proved by this one happening. Quote Link to comment Share on other sites More sharing options...
aguahombre Posted June 27, 2011 Report Share Posted June 27, 2011 Is "improbable" o.k.? Quote Link to comment Share on other sites More sharing options...
mycroft Posted June 27, 2011 Report Share Posted June 27, 2011 or, to give two examples from one tournament, 1♣ (nat, sound)-(1♦)-1NT; 4NT and 1♠-3♠; 7♠. Quote Link to comment Share on other sites More sharing options...
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