Correction or Misunderstanding: 8.2.2

[Jay Martin]

Building Skills in Python

PDF file

8.2.2

page 87

2nd Paragraph

2nd to last sentence

"The expression a or b means that one of the two is true; it also means that neither of the two is false."

 

Perhaps the second clause should be changed to:

"it also means that both are not false."

In the case that a is False, the expression 'a or b' may still be True if b is True (therefore b will be evaluated), which violates the second clause as quoted in bold above.

Or am I not getting something? Many thanks!

All my best,

Jay

[Steven F. Lott]

"Not the case that both are false" is clunky. Neither can be interpreted several ways, making it unclear. The section needs work. 

Sent from my iPhone

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