I'm sure I don't have to point out the obvious difference which is that a landing ends with a vertical speed that asymptotically approaches zero whereas a crash

I'm sure I don't have to point out the obvious difference which is that a landing ends with a vertical speed that asymptotically approaches zero whereas a crash also has a terminal vertical speed of zero (obviously) but with a discontinuous derivate and a rather high vertical speed at t minus episilon. The computer should be able to differentiate between situations where some plausible sequence of pilot actions will result in success, and one where no such success is possible.