Were Clovis foragers in Late Pleistocene North America big-game hunters, or just big-game scavengers?

There are currently 15 well-documented Late Pleistocene localities in North America in which Clovis points are found associated with proboscidean remains (of mammoth, mastodon and gomphothere).

Archaeologists routinely assume these localities represent evidence that Clovis people hunted these multi-ton animals, and in turn invoke that evidence to claim humans had a role in the extinction of these large mammals. ...