The terms attack and defense in poker are almost always used in an effort to describe the idea of initiative. We have this idea of aggression in poker as being represented by the actions that put more unmatched money into the pot like betting and raising, and then we have the actions that we tend to think of as passive like checking, calling and folding. This seems fairly intuitive. However, there is a very strong argument for the case that initiative does not inherently exist in poker, and this can lead us to search for the meaning of aggression in poker in other areas.
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