If there are four equations and only three variables, and no one of the equations is derivable from the others by algebraic manipulation then there is another variable missing.

If there are four equations and only three variables, and no one of the equations is derivable from the others by algebraic manipulation then there is another variable missing.
Talcott Parsons

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A gloss is a total system of perception and language.
- Talcott Parsons
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The main concern of the study is with the outline of a theoretical system. Its minor variations from writer to writer are not a matter of concern to this analysis.
- Talcott Parsons

If there are four equations and only three variables, and no one of the equations is derivable from the others by algebraic manipulation then there is another variable missing. Talcott Parsons

If there are four equations and only three variables, and no one of the equations is derivable from the others by algebraic manipulation then there is another variable missing.
Talcott Parsons