>>Is this a known problem?
>>

>>?.f. #  !.t.
>>

>>
>>I can not see something wrong with my syntax.
>>
>>

>>?!.f. #  .t.
>>

>>
>>runs pretty well
>>
>>
>>Lutz
>
>Hi Lutz:
>
>This way work:
>
>

>? .f. # (!.t.)
>

>
>Just add parenthesis

Fernando,

this add up stuff instead of simplifying.

.F. # !.T.

will end up the same as

?.F. = .T.

as I wrote somewhere in this thread, it was only about teaching boolean algebra. Multiple negation and the like. Just like while

IF ll_X=.T.

is superfuous.

So I was just curious how old this one is and if it is known.