YouNeverStopLearning, Lu Zuckerman, you are both right - I can't see any conflict in your positions.
If you keep within the "standard flight conditions" = e.g. FAR 25 = "the envelope", everything's tested and ok with a good safety margin. Outside the envelope you can break the a/c with either the pitch controls or the rudder, and according to a current Boeing
document, possibly the roll controls as well.
The above Boeing document also says on p. 10, "Elevators and ailerons are not designed for abrupt reversals fiom a fully displaced position."
Also, on p. 5, ".... control surface inputs are to be in one axis (not in combination), and do not include control input reversal or oscillatory inputs."
So the enveope apparently does not cover abrupt reversals of any controls, nor simultaneous changes in two axes.
Question: Can you deal with wake turbulence without using control reversals or making changes in two axes?
