When you talk about a collection of snippets and facts for an article, do you say "material" or "materials"?
You would use "material" (without the "S").
According to Dictionary.com:
The articles or apparatus needed to make or do something.
A group of ideas, facts, data, etc. that may provide the basis for or be incorporated into some integrated work.
protected by MetaEd♦ Aug 4 '16 at 15:10
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