Thanks, Bruce. It is clear to me, since no one has responded otherwise, that "constitutes good and bad writing'' is preferable to "constitutes as good and bad writing." For my ESL adult students learning vocabulary, syntax, and grammar in a beginning class, I will explain away the original writer's "constitutes as" as a typo!
Martha Galphin

Date: Fri, 12 Oct 2012 05:54:45 -0700
From: [log in to unmask]
Subject: Re: constitutes as or constitutes
To: [log in to unmask]

What I would write is probably something like:
3. What illuminates our judgement of what constitutes good and bad writing is reading a lot.

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