Viperdoc writes:

More less than more, and the fact remains that Anthony wouldn't even know
how to turn a TCAS on, let alone how to interpret the display or understand
how it works.

Neither the principle nor the turning-on of a TCAS system is particularly
difficult to understand. At least I do not find them so; perhaps they might
be challenging for some. If it were widely difficult to understand and use,
however, it wouldn't be very useful.