Some people just like to complicat life or ideas or things. As for others, they like simple stuff, such simple as mathematics. For example, what is nothing or what is zero?
The wikipedia - "the best concentration of knowledge" says:
The term "nothing" is rarely used mathematically, though it could be said that a set contains "nothing" if and only if it is the empty set, in which case its cardinality (or size) is zero. In other words, the word "nothing" is a colloquial term for an "empty set". "Nothing" and "zero" are closely related but not identical concepts, though, in common parlance, the word "nothing" can also mean "zero" which is a mathematic object that can, for example, symbolize a variable which is "lacking in value". This is why zero can be included in a set. Like "zero," the word "nothing" can symbolize the concept of "a lack of value". But as "nothing" is a linguistic term, it lacks any rigorous definition. Thus it can only be distinguished from context whether or not the word "nothing" represents what mathematicians would call an "empty set" (e.g. "There is nothing here"), or whether it represents what mathematicians would call a "zero" or a lack of value (e.g. "It is worth nothing"). This lack of rigorous definition can allow one to create statements which seem to be logical fallacies—If you have nothing except for nothing, do you have something or nothing?
Such way i think all of use should try to make thing simple, make it more "math " :)
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