Who needs it? Y'know, it's all written down in books; most of what I use in my job, you could sit a smart, motivated kid with a smattering of math down with a handful of parts and VOM and explain the basics in an afternoon; yet the arguments people in my trade -- including me -- get up to are simply staggering.
99.44% of the time, the problem is not that either side is wrong; it's that either or both hasn't fully put together everything they know. It's stuff they apply fairly often but there's some gap in understanding on either (or both!) sides of the dispute that prevents reasoning from specific examples to the bigger picture and back to how the other person understands matters.
TL;DR version: Oh, ghu, I gotta quit arguing on the internet. It only frustrates me and annoys the pig.
T. R. MCELROY'S STREAMLINED TELEGRAPH KEYS
9 months ago