This audio is a really great piece on continuum problems regarding property. Although there are certainly continuum problems with the concept of property, this is not enough to make someone not a propertarian. Individuals began to develop norms to satisfy the continuum problem involving property. Casey uses an example of height. A six foot five inch person might be tall, whereas a five foot five inch person might be short. However, Casey example is a norm, and as a norm it is relative to a particular group of individuals. Tall and short may differ among different groups, although all will have there own unique continuum problems. It will still be a different range. The roles that property undergoes, depends on the habits, customs, institutions and the overall social laws. Time also has continuum problems yet it provides individuals that utilize the same time measurement a reference point from which the individuals of the group can make distinctions with one another. This is also true of measurements of space. They both allow for planning and coordination among individuals. Time and space are measured by way of arbitrary cultural and social conventions. Property can be measured through a number of ways using measuring systems - visual markers, GPS coordination, signs, addresses, etc.. In order for something to be property it must be designated through some type of social convention. The distinction of property is prior to the usage of property. If property was being used for some purposeful use, then it would have already been distinguished through some type of social convention. When do you ever measure air or sea water? When you make some use of it.
I have some more thoughts on this audio that I will have to comment on later.
Gerard N. Casey - Ownership and Possession - Where Do You Draw the Line?