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On Sat, 21 Oct 2000 09:22:40 -0700, Ming-Li wrote:
>> And when an alternative was offered to a rule it was this
>> rule *or* this alternative or this alternative, etc.
ML> That's right!
Indeed.
>> What's the difference between what I set up & what you set
>> up?
ML> Let's simplify it and see if it helps. Your original filter is like
ML> this:
ML> Rule move messages to folder trash
ML> Strings Location Present
ML> A recipient no
ML> Alternatives
ML> B recipient no
ML> C recipient no
ML> So logically it's
ML> IF (not A) OR ((not B) AND (not C)) THEN move to trash
Actually it's :
IF (not A) OR ((not B) OR (not C)) THEN move to trash
Once you place a string in the alternatives area it's an OR string
match that's done.
I have a single filter setup for my friends for instance. Whenever I
wish to filter someones mail to my friends folder, I just add their
e-mail address as a filter string under the alternative section. Hence
*any* single e-mail address in the alternatives section will trigger the
filter.
The only way to produce an and effect is to add filter strings to the
'filter strings' section under the Rules section.
ML> See? "OR" is used between rule sets (the main rule set and the
ML> alternative rule set), while "AND" is used between the two rules in
ML> the alternative rule sets.
ML> Let's resolve it to:
ML> IF (not A) OR (not (B OR C)) THEN move to trash
But this is right. :-) Hmmm, is that the same as what you originally
wrote above? <g> Didn't seem so to me. <sigh>
ML> Here the first OR is the original one linking two rule sets, and
ML> the second OR is because we take the "NOT" outside.
ML> Let's further resolve it to:
ML> IF not (A AND (B OR C)) THEN move to trash
ML> and further:
ML> IF (A AND (B OR C)) THEN DON'T move to trash
ML> which is:
ML> IF (A and B) OR (A and C) THEN DON'T move to trash
LOL! What?!! Now I'm confused. :-)
[rest snipped and not read in case I get more confused. :-)
ML> To avoid confusion, I suggest don't use the "|" together with "No"
ML> in Presence. (Some would advice avoiding "|", period, which is a
ML> fine suggestion. I personally use it, for it's convenient. But be
ML> sure you know what TB would do with it.)
Now *that's* not confusing and a good suggestion. However, in my
experience with these filters, his present rule would be equivalent.
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A. Curtis Martin..
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