I was wondering if it was acceptable to make a sentence less choppy by using “that” without a comma to introduce a clause that could be introduced with a comma followed by “which,” because the sentence would still be grammatically correct without the clause.
For instance, if the nonrestrictive clause in sentence (1) was removed, the sentence would still be grammatically correct, even though it would then be less instructive. However, (2) flows better than (1) because that clause is written as if it were nonrestrictive.
(1) The painting depicts a priest drowning the girl in a lake, which the avowedly anti-Christian artist may have used ambiguously to represent water’s ability to free the soul by killing the person.
(2) The scene depicts a priest drowning a girl in a lake that the avowedly anti-Christian artist may have used ambiguously to represent water’s ability to free the soul by killing the person.
Thanks very much for clarifying this issue for me, even though I may not have phrased my question in the best way possible.