Thanks for the correction AnalogKid. Yes #5 is wrong. My new general rule which replaces all the ones in the original post is the pin of the transistor with the least changing voltage is the common pin. If it is an out pin it would be changing.I skimmed through the thread and did not see this: Back to the original post, #5 is incorrect. #5 is common collector, just like #2.
There are pedantic, semantic, and qualifying issues with each statement, but I see the kind of truth table you are trying to construct. All of the subtleties of real circuit design notwithstanding, the table is ok for guidance.
Something you might add are the (low / medium / high) input and output impedances of each of the three circuit classes. Very handy in figuring out someone else's design decisions.
ak
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