Ph.D. in linguistics. As a service to the community, my changes are intended to improve the readability of the text. I do not change content unless it involves removing an error that the author clearly did not intend. I do make content changes related to areas in which I happen to have expertise. In those cases, I make a note of what I did and why. My changes reflect U.S. standard editing practice, but I do not impose U.S. editing on articles based on British or other recognizable standards.