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When did we stop wanting to learn?  Do we believe it is futile to learn how a technology functions because it is changing so rapidly?  

This booklet was published in 1940 by the public relations department of General Motors.  In order to convey to the public how a headlamp works they produced a 32 page document that explained the electromagnetic spectrum and refractive index.

Do you know how a diode works?  Do you think GM would feel compelled to teach you solid state chemistry to help you understand?  Is your mechanic the one who should worry about that?  When did we stop wanting to learn?