Or to put it in another way, they both served similar purposes. Diane likes to present herself as being smart and an intellectual, when she is in actuality, just as dumb as everybody else at Cheers.

Meanwhile, Rebecca thinks that she's a modern (at least in the '80s) businesswoman, when she's actually a regular loser like everyone else at the bar.

"actually a regular loser like everyone else at the bar"


your point is valid +-

actually the only rocket scientist in the main cast is Frasier and he is not so bright at times (I forgot Lilith - is she at the top of the heap ?)

did the writers keep the cast just average I Q for mass appeal ?

Diane actually WAS smarter than Rebecca- especially after the 2nd year Rebecca was on!

And she was by no means as much of a crybaby as Rebecca was!