Questions about functions which maintain an expression in unevaluated form, including the use and behavior of Hold, HoldForm, HoldComplete, and HoldPattern. Also questions concerning the attributes HoldFirst, HoldRest, HoldAll, etc.

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Defer, Hold, Unevaluated, Inactivate — which one when?

What are some guidelines on which function to select from among the superficially similar functions Defer, Hold, ...