On 12/12/2015 8:44 AM, peter dalgaard wrote:

On 12 Dec 2015, at 10:54 , Martin Maechler <maech...@stat.math.ethz.ch> wrote:

My conclusion: Breaking such a fundamental lemma of logic as
  "the empty set is always true"

Umm, that doesn't make sense to me. Surely you mean that "an AND-operation over an 
empty index set is TRUE"? A similar OR operation is FALSE, i.e. they behave like 
empty products and sums, respectively.


How about "the empty set is all true, and all false."

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