| http://www.w3.org/ns/prov#value | - conjunctionDefinition of LET ALONE : to say nothing of : not to mention ???used especially to emphasize the improbability of a contrasting example <he would never walk again let alone play golf ??? Sports Illus.> <how many ever see an Ambassador or Minister, let alone a President ??? Robert Lacville> See let alone defined for kids Missing Downton Abbey?
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