Affordance
Affordance: Relationship of object and user, that enables some usage.
Don-Norman makes it very clear in his book that Affordance is NOT a property of an object. It is a relationship between the object and user.
His example is that chair affords sitting for an average adult, but does not afford sitting for ants.
Moreover there is a destinction between affordances that an object has an perceived affordances, what the target customer can perceive (see, feel, hear) that the product can do.
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