``And'' versus ``or''


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``And'' versus ``or''

It can seem that the connection between two facts for the same ``verb'' sometimes means ``and'' and sometimes ``or''. For example

mean ``Earth has one moon and Mars has two moons'', while

means ``A skier is a beginner if they had fewer than ten lessons, or if their fitness is poor''? Why is this?


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Next: How rules are phrased
Up: English versus Prolog (PP)
Previous: The uses of ``if''
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Jocelyn Paine
Tue Jun 4 17:40:31 BST 1996