Okay, as an "outsider" to this thread, it strikes me as mentionable that the original post is headlined: "teach me..."
Then, when people try to do just that, the original poster becomes defensive and starts talking about the number of engine failures, etc., that he has experienced. My observation/suggestion is this: It's better to say TAS than "airspeed across the ground depending on altitude in still air". ("Depending on altitude" impliedly taking temperature into account.) And if the more laborious description is used, then openness to its general equivalence to TAS should be entertained. Don't say "teach me" if you are not open to such input. The poster who said he had teaching/instructional experience acted reasonably in responding to a "teach me" post.
Then, when people try to do just that, the original poster becomes defensive and starts talking about the number of engine failures, etc., that he has experienced. My observation/suggestion is this: It's better to say TAS than "airspeed across the ground depending on altitude in still air". ("Depending on altitude" impliedly taking temperature into account.) And if the more laborious description is used, then openness to its general equivalence to TAS should be entertained. Don't say "teach me" if you are not open to such input. The poster who said he had teaching/instructional experience acted reasonably in responding to a "teach me" post.