Consider the set 
of natural numbers and an operation 
which means select the first of the two. That is,
Is 
associative for 
? Answer yes or no.
Definitions:
Economical
Characterized by efficiency of resource use, often aiming to minimize cost while maximizing output.
Concisely
In a manner that is brief but comprehensive and clear, using as few words as necessary.
Receiver's Perspective
Considering the point of view and understanding of the person who receives the communication.
Feedback
Information given to someone about their performance or work, intended to guide future improvements.
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