exsperryment
What da inventor of fancy non-slip footwear did to find da ideal tread-pattern.
Famous footwear-inventor Paul S. fashioned an exsperrymental shoe-sole using grooved patterns like those dat he observed on da pads of his dog's feet; said four-legged companion never seemed to slip on wet or icy surfaces, so da brilliant engineer figgered dat human shoes designed in da same way might provide superior traction, also.