Not quite.

My son wanted to tell me about a gag from an Animaniacs cartoon.

"And there was this poster on the wall, and he was pointing — a poster of — you know — um — you know Uncle Tom, mom?"

Me, nonplussed:  "Uh — like the book Uncle Tom's Cabin?"

"No, not a book — you know — the symbol of the United States?  Of the Army and stuff?"

I stared a moment before it connected.

"That's Uncle Sam."

"Oh, yeah.  Well, anyway, there was this poster on the wall –"

"U for Uncle.  S for Sam."

"Oh yeah."  Sheepishly.  "I remember now."

"Please try not to forget it."