There doesn't seem to be a grammatical inconsistency in this sentence; I must agree it is a little non simplified! Rephrased sentence: Going for a 'change of scene' and/or ' rehearsing injustice to motivate a strong response later ' can remove emotional stimuli. Comment: By making such a construction, the author is, perhaps, laying emphasis on the fact that the latter-written phrase can have the same effect as the former ('change of scene').
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