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>Marco (the waiter) Cameriere meets Pigritio (Piggy) Risorgiamento in the automat.
>“Say, Marco. You know that guy Watermaker?”
>“Watermaker the differential geometer?”
>“Yeah. Know something? He uses infinitesimals. Infinitesimals aren't rigorous.”
>“Aw, c'mon, Piggy. Everybody uses infinitesimals these days. They can be made rigorous. They are rigorous.”
>“They're not rigorous, Marco. Watermaker needs a lesson in rigour.” Idly chopping his cigar in bits with poultry shears, Pigritio emphasises the point. “What he needs is rigour.”
>The following day, a shocking announcement is made at the conference on singularities at New Rochelle.
>“Dr Watermaker is in hospital, apparently with a shoulder wound caused by a sawn-off shotgun or some similar instrument. Fortunately, we have been able to fill in a replacement speaker."
>"Professor P. Risorgiamento will talk on "The treatment of obstructions".”