bright-line
n.— «Bright-line guidance is what’s called for, not blocks to the progress of enforcement cases or their resolution.» —“SEC’s Cox Tightens Reins on Enforcement Division (Update1)” by Otis Bilodeau Bloomberg.com Apr. 13, 2007. (source: Double-Tongued Dictionary)
Further reading
Why isn’t “you’re welcome” the default response to “thank you” for everyone? Plus lies that kids tell, Philadelphia lawyer, cowbelly, skutch, mind-bottling vs. mind-boggling, tsundoku, infanticipating, noisy piece...
Centuries ago, monks who took a vow of silence developed their own hand signs, with hundreds of gestures, that are still in use today. Plus, how do speakers of different languages distinguish similar shades and tints of colors such as red, yellow...