 We can distinguish between three broad categories of response to the examples of Putnam and Burge. On one extreme, to use the terminology of Segal (2000), we have the unqualified acceptance of the extreme externalist. Many philosophers have been persuaded by examples like those of Putnam and Burge that all or nearly all mental content is broad. Such philosophers are highly skeptical about the usefulness of any notion of narrow content. Burge himself is a noteworthy proponent of extreme externalism; other extreme externalists include Robert Stalnaker (1989, 1990, 2008) and Robert A. Wilson (1995).