'to anyone who...' vs 'to everyone who...'

[Tamara]

Hi

To anyone who <is familiar with .. / has a heart/ … whatever> it is clear that…

To everyone who <…> it is clear that…

Could you say, which one sounds more 'categorical'? (if they are not 'equal')
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It’s impossible to learn swimming without entering the water…

[Mister Micawber]

.
'Categorical'? I would suggest: 'Which one sounds more inclusive?'-- but then, I am not sure what you are looking for here in the way of a difference, Tamara.
.
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Native English teacher at Mister Micawber's

[Tamara]

Sorry, if I used the wrong or confusing word.

categorical:
1. Being without exception or qualification; absolute.
http://www.bartleby.com/61/2/C0160200.html

categorical:
1. without exceptions or conditions; absolute; unqualified and unconditional
http://dictionary.reference.com/search?q=categorically&r=66

categorical (also categoric): unambiguously explicit and direct
http://www.askoxford.com/concise_oed/categorical?view=uk

The reason I ask is that to me, with my Russian background, to everyone sounds a bit 'more absolute' (:)), but I assume that in English the above fragments can be (/sound) equivalent.
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It’s impossible to learn swimming without entering the water…

[Conchita]

To anyone who = to some person who -- it doesn't matter who or how many people.

To everyone who = to all people who.

[Tamara]

Hi

(Not considering here phrases like Everyone who’s anyone [in music/ in trade publishing/ …])

Thanks, Conchita.
As ‘anyone’ and ‘everyone’ in Russian are also different words, I understand the difference in the two meanings you explained.
More or less.

But when I read some English phrases I feel that I’m not sure at all which one I should use if I needed to translate them in Russian by using one of the two.
(By the way, for such cases, especially), there is a Russian word всякий that, in fact, means ‘anyone, anybody, everyone, everybody’.
Sheet anchor. :))

For example, let’s take the phrase: Not everyone who uses a computer fixes it themselves

From the point of meaning ‘Not anyone who uses a computer fixes it themselves.’ would have the same meaning:
‘There are people who use a computer but don’t fix it themselves.’ (:))

But the two phrases sound differently, and the second (in my view) would make more emphasis that there is at least someone who differs from others in that sense.
Whereas the first phrase with ‘not everyone’ sounds (to me) neutral.

But I don’t know... This is the case when I would use in translation that ‘third’ Russian word that makes no distinction between ‘anyone’ and ‘everyone’…

PS