Assertion: artifact's use | /r/HasProperty | unimodal
Facets:
Source sentences:
text: The underlying logic of such research is that artifacts wear out and are discarded as they are used and that the number of times an artifact can be used before wearing out is predictable; that is, a histogram summarizing the number of times a particular kind of tool or utensil can be used before wearing out will be unimodal, with a mean number of uses and a standard deviation.