Say, if you go on dates for six months, do the proper style, do dancing and social classes, break your comfort zone, host parties and make new friends, go spend time in new social circles -- and by the end of it you didnt experience any transformation, then you "know". Knowing that you cant without trying is just a defense to protect your current dating comfort zone. So it´s not really a "cant", but a want. Test limits through bold dating action.