science

It's illustrating the point of why restricting certain groups of people from voting is very ill-advised. It may seem like an extreme example, but it can get the point across.

It pretty much says that when you start to remove voting rights from some people based on something that may be out of their hands, it can open that system up to be abused. Just like what the US experienced with women and blacks. (We remember the Suffrage and Civil Rights Movements, right?)