In message <[email protected]>, dated Tue, 2 May 2006, 
John Woodgate <[email protected]> writes


>Yes, and UL 94 is correct; UL60950 isn't. Curiously, a similar case 
>arose in amending IEC 60065, and I had to use the same argument to 
>demonstrate the proposition 'A OR B = NOT A AND NOT B'.

OOPS! (a logical operator not envisaged by Boole!) That should be:

'A OR B = NOT(NOT A AND NOT B)'.


-- 
OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk
2006 is YMMVI- Your mileage may vary immensely.

John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK

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