Re: The seven step series

From: m.a. <>
Date: Tue, 14 Jul 2009 22:15:35 -0400

  ----- Original Message -----
  From: Bruno Marchal
  Sent: Tuesday, July 14, 2009 4:40 AM
  Subject: Re: The seven step series

  Hi Kim, Marty, Johnathan, John, Mirek, and all...

  Bruno: May I advise you about an instance of English usage? The word "supposed" in the next sentence is often used as sarcasm to imply serious doubt about the statement. In this context it can be interpreted as a slight. I think you meant to say "assumed" which implies an evident fact. Please don't apologize, we are most grateful for your efforts in using English and are happy to make allowances for minor slips.

  B = {Kim, Marty, Russell, Bruno, George, Jurgen} is a set with 05 elements which are supposed to be humans.

  I also have a question: see below:

  We have seen INTERSECTION, and UNION.

  The intersection of the two sets S1 = {1, 2, 3} and S2 = {2, 3, 7, 8} will be written (S1 \inter S2), and is equal to the set of elements which belongs to both S1 and S2. We have

  (S1 \inter S2) = {2, 3}

  We can define (S1 \inter S2) = {x such-that ((x belongs-to S1) and (x belongs-to S2))}

  02 belongs to (S1 \inter S2) because ((2 belongs-to S1) and (2 belongs-to S2))
  08 does not belongs to (S1 \inter S2) because it is false that ((2 belongs-to S1) and (2 belongs-to S2)). Indeed 8 does not belong to S1.

  Doesn't the statement in bold (above) contradict the statement immediately preceding (also in bold)?


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Received on Tue Jul 14 2009 - 22:15:35 PDT

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