Comment Re:All copper is "oxygen-free" (Score 1) 60
The only thing stopping you from calling the water pipes in your house "copper-phosphorus pipes" is laziness and poor attention to detail.
Have you ever heard a single person, including plumbing professionals, call them "copper-phosphorus pipes"?
No. Because that's not how the English language works. You're the one who is too lazy and ignorant to figure out how people actually communicate in society.
Hint: The systematization your mind wants to apply to everything is not absolute. You need to figure out when to relax the formal logic rules when they start to result in absurd outcomes.