ETH Sim And4
AND-4, 3D graph, Input Range [0 .. 1]
AND-4, Input Range [0 .. 1]
I could get any and-like behavior. Tried out various parameter settings. If there is still an error in the ODE's, I couldn't find it.
One of the best results looked like this (which is definitely not an and) - and all simulations looked pretty similar: