What's the difference between i.e. and e.g.?
early 15c., from Old French negacion (12c.) and directly from Latin negationem (nominative negatio) "denial," noun of action from past participle stem of negare "deny, say no" (see deny).
negation ne·ga·tion (nĭ-gā'shən)n. A denial, contradiction, or negative statement.