nteresting , thanks. we were wondering if a situation , like the China 747SP had in 1985 over the Pacific (see China Airlines B747SP Loss of Power and Inflight Upset could occur with a VLJ banking abruptly following a wake or severe turb encounter at very hight altitudes.
Upset and stall are 2 VERY different things. Upset is a sudden change in pitch or roll attitude beyond defined limits. Stall is increase in angle of attack beyond a defined limit. Either one may occur without the other.
Indeed, an upset will be the likely result of such an encounter with wake turbulence. While such an upset may be violent enough to cause injury to unrestrained people (or to restrained people colliding with other unrestrained objects), it will not necessarily result in a stall or prolonged uncontrolled flight.