In fact, during World War II, there was a
useful distinction made in the slang of the RAF, which distinguished the «info,» a lot of boring rigmarole about useless facts, from the «gen,» the
real stuff you needed to know to tell you how to operate.
While for serious
stuff a Fluke is worth more than a billion cheap Chinese multimeters, having 3 or 4 of the latter will be immensely more
useful than a single top brand one because seeing in
real time the battery voltage and what develops around a voltage divider when you change the resistors ratio has no price.