The Practice of Everyday Life

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Strategies are able to produce, tabulate, and impose these spaces, when those operations take place, whereas tactics can only use, manipulate, and divert these spaces.(...)
These modes of use- or rather re-use -multiply with the extension of acculturation phenomena, that is, with the displacements that substitute manners or “methods” of transiting toward an identification of a person by the place in which he lives or works. That does not prevent them from corresponding to a very ancient art of “making do.” I give the name of uses, even though the word most often designates stereotyped procedures accepted and reproduced by a group, its “ways and customs.” The problem lies in the ambiguity of word, since it is precisely a matter of recognizing in these “uses” “actions” that have their own formality and inventiveness and that discreetly organize and multiform labor of consumption.

Michel de Certeau, The Practice of Everyday Life, UC Berkley Press, p 30
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You see how people interact and identify themselves with "given" environment and objects. As de Certeau puts it, there is the problem laid in the ambiguity of materials("word") although they are "designed" to use in certain way. However this ambiguity also makes the use of objects so much more fun and open ended. What makes Design so fascinating is that it transforms itself within people's everyday practices.