What is a "Musclecar" in the public's narrow definition?.....

I had a reader comment on the post about 2 bbl musclecars. His opinion was that a car with a 2 bbl carb and single exhaust is not a musclecar.  I responded with the question-"You don't think a '68-74 Charger with a 383 or 400 V8 is a Musclecar?" "Or a '67-70 Mustang with a 390, or a '70-74 Firebird with a 400 V8?"  Because of the carburator and exhaust system?  How does that work?  Another guy said that no "Real" musclecars were built after 1972!!  Still another said no "REAL" musclecars had automatic transmissions.  Really?  The 1973-74 SD-455 Trans-Am is not a musclecar??  A '73 Charger with a 440 , a Torqueflite and 3.55 geared 8 3/4 is NOT a musclecar?  The 1976 T/A with a 455 and a 4-speed or the '79 with a 400 and a 4-speed is not a musclecar?  The Buick Grand National is not a musclecar? I had a '73 Hurst / Olds 442 with a 455. Is it not a musclecar because it has an automatic trans or because it was built after '72?  Is the 717 hp Charger Hellcat NOT a musclecar because it has an automatic and 4-doors??  Come on guys. You can poke fun at "Bandit" T/A's or 80's "5.0" Mustangs and 305 and 350 powered Camaros and Firebirds from that era, but the bottom line is they were the fastest cars available at that time, and kept the flame alive, which is why we got cool stuff like the Grand National, and why we now can buy 500 hp Mustangs and 700 hp Challengers off the showroom floor. Is a '75 Monte Carlo with a 454 or a '76 Gran Prix with a 455 or a '76 Torino with a 460 NOT a musclecar? They have single exhaust, right?  Or you could say their not a musclecar, their a "Personal Luxury Coupe" which is what the buff magazines called them back then.  Really?  Isn't that kind of splitting hairs? I Remember years ago a magazine writer claimed that the Porsche 928 was NOT a sports car because it  was available with an automatic transmission. Now almost all the supercars are autos. But according to this guy the Nissan GTR, Jaguar F-type, and Audi R8 are NOT sports cars because none of them have manual transmissions!!  Ok, bud keep your 1950's TR3 without synchros, because REAL men drive 4-cylinder, two seat convertibles with sticks!!  Or shut the fuck up and go buy a Miata!! But don't tell me that a Nissan GTR isn't a badass sports car!!  Several years ago Webster's or Funk and Wagnalls had a definition of a Musclecar. It read- "A compact or mid-size american sedan with a powerful mid-size or large V8 engine, designed to accelerate rapidly." Like the Road Runner cartoon's definition- "Accelerati Rapidus Maximus" .  Let's stop arguing semantics. I mean really-a '72 Chevelle with a 454 is a musclecar, but a '73 Hurst / Olds is not, even though the '73 Olds is quicker in the 1/4 ?  A '72 Road Runner with a 440 is a musclecar, but a '72 Gran Prix SJ with a 455 is not, even though the GP is quicker in the 1/4?  We all love our musclecars, new and old.  Mastermind