In that short sentence it’s optional. I’d probably use it.
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DaithyAren't subordinating conjunctions supposed to be not punctuated when in the middle of a sentence, unless they are used in a parenthetical sense?They can be restrictive or non-restrictive (this latter is what you mean by 'parenthetical', I presume. This definition also subsumes the idea of 'pausing and thinking'). In many utterances, the subordinate cl
Daithy Ex. "Police officers are the good guys whereas criminals are the bad guys."Thanks.I would use a comma.