It is time for the adoption of the sarcasm point. Why the sarcasm point? We have a mark that conveys that we mean or know something. We have one that says it with volume and force! We have one that communicates that we don't know something, don't we? We need one more: to do for language what shade did for drawing, what color did for television, and what eyebrows did for expressions—introduce finesse.
The problem is simple. We live in a whiplash, light-speed world in which motion can range, within minutes, from standstill to supersonic, decibel levels range from NPR to Limbaugh, and the range of sincerity can shoot from earnest to irreverent in nanoseconds.