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Reading some of the comments on StackExhange, I came across

this is irrelevant for this question

Shouldn't it be "irrelevant to this question"? Searching on Google I found both are used in various academic texts.

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up vote 4 down vote accepted

I prefer irrelevant to, but certainly accept irrelevant for:

  • Noun phrase: This is irrelevant to (for) the matter at hand
  • Gerund: This is irrelevant to (for) resolving the matter at hand
  • Personal pronoun: This is irrelevant to (for) me

However, when the complement is preposed, I prefer for over to:

  • Noun phrase: For/?to the matter at hand, this is irrelevant
  • Gerund: For/??to resolving the matter at hand, this is irrelevant
  • Personal pronoun: For/to me, this is irrelevant

—though note that to me in the last sentence means to my mind (To me, this is irrelevant doesn't seem to mean what This is irrelevant to me does)

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Sorry, couldn't resist. – Daniel Harbour Jun 23 '12 at 12:46
I'm fairly certain that you quite easily could've resisted, actually. – user11550 Jun 23 '12 at 12:50
@Daniel: +100, seriously – Armen Ծիրունյան Jun 23 '12 at 12:50
Thanks! I appreciate your time. We should probably correct spelling mistakes this way. – Noah Jun 23 '12 at 12:57
@Noah Now that you've removed them, my comment doesn't make sense. Ah well, better that it's corrected, though. – Daniel Harbour Jun 23 '12 at 14:06

Although, mostly, "irrelevant to" is the correct phrase, it is sometimes used interchangeably with "irrelevant for". I couldn't find many examples where "irrelevant for" has been used (and in these examples, "irrelevant for" can be conveniently replaced by "irrelevant to"). enter image description here

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