It's frequently said that horses fake lameness to get out of work. Or that they spook to annoy their riders. But horses simply do not have the cognitive capacity to plot and scheme in this manner. They are no more able to mentally plot and scheme than we are able to flap our arms and fly. They lack the cognitive ability as much as we lack the physical ability.
Plotting, scheming and devising are all easily accomplished by human brains. The cognitive qualities that allow us