I don't think it's the schrader valve (six or seven used)

Looked up obfuscation...

Obfuscation refers to the concept of concealing the meaning of communication by making it more confusing and harder to interpret.

Obfuscation may be used for other purposes. Doctors have been accused of using jargon to conceal unpleasant facts from a patient. Author and doctor Michael Crichton has claimed that medical writing is a "highly skilled, calculated attempt to confuse the reader". [1]. Similarly text-based language, like gyaru-moji and some forms of leet are obfuscated to make them incomprehensible to outsiders

The writer says "There are plenty of hints here, and hardly any obfuscation"

Plenty of hints = mentioned the light bulb

Hardly any obfuscation = there is some

I rest my case