Other things that were used before toilet paper include: Hay, corncobs, sticks, stones, sand, moss, hemp, wool, husks, fruit peels, ferns, sponges, seashells, and broken pottery. 15. 70-75% of the world still doesnât use toilet paper because it is too expensive or there is not sufficient plumbing.
Propensity is defined as a natural tendency. An example of propensity is an inborn love for writing. pl. -Â·ties. 1  a natural inclination or tendency; bent.  Obs. favorable inclination; bias (for)
The propensity theory of probability is one interpretation of the concept of probability. Theorists who adopt this interpretation think of probability as a physical propensity, or disposition, or tendency of a given type of physical situation to yield an outcome of a certain kind, or to yield a long run relative frequency of such an outcome.