However, there are certain areas of research in which working theories of nature have been established and can be relied upon to an extremely high degree to predict future experimental results. (realclimate.org)
My current working theory is that this is related to the engine trying to perform some kind of frame pacing, but without access to the source code that is hard to ascertain. (pcgamer.com)
But it is the best working theory we've got that can actually be backed up by logic. (religion.blogs.cnn.com)