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I realize it's usually better to just say "A and B are redundant". But, I've also seen

  • A is redundant with B
  • ... to B
  • ... of B

all with basically the same intended meaning. Are any of these more (or less) correct?

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I'm not sure a preposition would be appropriate... I'd just say A and B are redundant. –  snumpy May 3 '11 at 15:06
Whatever your explicit question, stick with your realization. –  Mitch May 3 '11 at 21:57
@snumpy So what you're saying is that a preposition would be… redundant? –  ghoppe Sep 15 '11 at 1:03
@snumpy - there may be situation that A is redundant with B, but B is not redundant with A (A is a subset of B). "A and B are redundant" would be misleading here. Maybe there is a better way to express it? I am unsure whatever "A is a subset of B" would be properly understandable for average people. –  Bulwersator Mar 19 at 9:14
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4 Answers 4

up vote 8 down vote accepted

The correct idiom is:

A is redundant with B.

Google hit counts confirm that "redundant with" is by far the preferred usage:

  • "redundant with" — 310,000 results
  • "redundant of" — 45,900 results

"Redundant to" actually shows more results that "redundant with", but the vast majority of those are actually "redundant" followed by an infinitive, eg. "It is redundant to specify both height and width."

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As I programmer , and not an English professor I would like to offer what I consider the logical solution.

A and B are redundant... Is the best general approach, because there are no relationships defined and because of this the statement is easily clarified. Simply put, both terms are redundant, and we do not care why, we also don't care what they are redundant to.

A is redundant with B.... In this approach I get the feeling that A and B are somehow connected in the following ways:

  1. Both A and B are redundant
  2. Both A and B possibly became redundant at the same point in time
  3. Both A and B are possibly redundant for the same reason

... to B .... Here the meaning is completely changed, here we see A becoming redundant to B. Not related to A and B are redundant.

... of B .... Again this adds more meaning to the statement. A of B. When B exists A is redundant. If B does not exist, then A is possibly relevant.

That is my 2 cents as a developer.

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For the most part, I agree with JSBangs, but...

A is redundant since B

Can be effective as well.

-EDIT- In light of recent comments.

I should have posted an example what I meant by this. After re-reading the question, I'm not quite sure if this is what the asker was looking for.

  1. 'A' is equal to 'B'.
  2. 'B' is equal to 'A'

2 is redundant since 1.

Which makes perfect sense, but isn't quite the usage that's described in the question.

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I have never seen "since" used like that, whether in its traditional sense or as a synonym for "because". You'd say "because of B" not "because B"; isn't a helper also needed to make it work with "since"? –  Matthew Read May 3 '11 at 14:00
do you have a reference for this? –  tenfour May 3 '11 at 14:49
Edited. Sorry about the confusion. –  MikeVaughan May 3 '11 at 15:01
@Matthew Read: Because needs of when it is used with a noun phrase. Since doesn't but (at least to me) it sounds strange used this way, unless you're talking propositional logic or something. –  z7sg Ѫ May 3 '11 at 15:07
I'm willing to accept that I may be wrong. haha After looking at it, it kind of just sounds like the computer programmer in me coming out. –  MikeVaughan May 3 '11 at 15:09
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[ became redundant with ] – 68,700 Google hits

Implied: B is superior to A (or something similar).

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