You can imagine a culture as a correlate to self-sufficient economy where everyone could collect information and create works solely by himself without any communication with the others. Actually, however, we exchange commodities through money and views through language.
Why does money have value and circulate, though it does not have value in itself? I will answer this question in terms of the system theory.
A social system is not just a gathering of people. It does not consist in the interaction between people either. You can find a mere causal interaction between things.
What is definition? This is a question hard to answer. This requires the definition of definitions. You must know what a definition is before defining definitions. To get out of this circulation, let's first follow the traditional definition and then examine the validity of it.
The usage of the pronoun I is not innate but acquired. At first, Infants use their proper names to refer to themselves. It is so difficult to master the usage of I that it takes a long time for infants to know how to use the first-person pronoun. When, how and why did we get to use the first-person pronoun?