substance-free : Common Errors in English

About substance-free

An administrator at our university once announced that his goal was a “substance-free” campus, which I suppose fit in with the fad of the period for “virtual education.” What he really meant was, of course, a campus free of illegal drugs and alcohol, designated “controlled substances” in the law. This is a very silly expression, but if he’d just said “sober and straight” he would have sounded too censorious. How about “drug- and alcohol-free”?
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