Quote Originally Posted by Demiparadigm
Specifically, while it is approximately never correct to fold AA, it is probably sometimes correct to fold KK, and often correct to fold QQ.
This is obviously read-dependent (no very aggressive players involved) and assumes rational players, but I think once there is a raise, re-raise, and re-re-raise, QQ is usually beat.

Example:

FullTiltPoker Game #218398813: Table Double Arch - $0.10/$0.25 - No Limit Hold'em - 18:51:55 ET - 2005/09/14
Seat 1: DizzeeRascal ($15)
Seat 2: Bad Beats 4 U ($22.60)
Seat 3: Zangief ($47.90)
Seat 4: Boiler131 ($10)
Seat 5: TripSearchin ($31.65)
Seat 6: Hendawg2 ($5)
Seat 7: Harkilicious ($10.25)
Seat 8: luke_golf ($9.75)
Seat 9: Born2playpoker ($15.60)
luke_golf posts the small blind of $0.10
Born2playpoker posts the big blind of $0.25
The button is in seat #7
*** HOLE CARDS ***
Dealt to Zangief [:Qd: :Qs:]
Bad Beats 4 U has 15 seconds left to act
Bad Beats 4 U raises to $0.75 <--- Takes a long time thinking UTG, then raises
Zangief raises to $2.50 <--- I reraise
TripSearchin calls $2.50
Hendawg2 folds
Harkilicious folds
luke_golf folds
Born2playpoker folds
Bad Beats 4 U raises to $8.25 <--- Big re-re-raise, I'm probably beat, and no need to call $5.75 for set, either
Zangief folds
TripSearchin calls $5.75
*** FLOP *** [8c 2h 9s]
Bad Beats 4 U checks
TripSearchin checks
*** TURN *** [8c 2h 9s] [Th]
Bad Beats 4 U bets $10
TripSearchin folds
Uncalled bet of $10 returned to Bad Beats 4 U
Bad Beats 4 U shows [:Kc: :Kd:] (a pair of Kings)
Bad Beats 4 U wins the pot ($18.40)
TripSearchin adds $1.60
*** SUMMARY ***
Total pot $19.35 | Rake $0.95
Board: [8c 2h 9s Th]
Seat 1: DizzeeRascal is sitting out
Seat 2: Bad Beats 4 U collected ($18.40)
Seat 3: Zangief folded before the Flop
Seat 4: Boiler131 is sitting out
Seat 5: TripSearchin folded on the Turn
Seat 6: Hendawg2 didn't bet (folded)
Seat 7: Harkilicious (button) didn't bet (folded)
Seat 8: luke_golf (small blind) folded before the Flop
Seat 9: Born2playpoker (big blind) folded before the Flop