Is knowledge singular or plural?

I am not sure if I should add an article. Should I use a mean or means or a means??

Prior knowledge as means to combat …

Or,

Prior knowledge as a mean to combat …

Or,

Prior knowledge as a means to combat …

Answer

Knowledge is uncountable, and so does not normally take either an indefinite article, or a plural ending. Like other uncountables, it can sometimes be used as countable, when it refers to a specific instance or a particular type (I mention this for completeness: it’s not relevant in your example)

Means (in this sense) is singular, despite its -s ending. It can also be plural, so the article a is used when it is singular, not when it is plural.

Since knowedge is (uncountable and) singular, singular means is most appropriate here.

So the most idiomatic of your options is:

Prior knowledge as a means to combat …

Attribution
Source : Link , Question Author : user9371654 , Answer Author : Colin Fine

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