What's the difference between i.e. and e.g.?
1650s, "sense of touch or feeling" (with an isolated instance from c.1200), from Latin tactus "touch, feeling, handling, sense of touch," from root of tangere "to touch" (see tangent). Meaning "sense of "discernment, diplomacy, etc." first recorded 1804, from a sense that developed in French cognate tact.