Anthropology may be reducible to sociology, as sociology
involves systemic stereotyping (anthropology generates useful
stereotypes of subcultures) via statistical analysis typically
combined with the storytelling which is also similar to
anthropology. There *is* a blurry line between sociology and
psychology when considering small groups in sociology and the
psychology of groups. It's likely possible, although it's like
the difference between one or two bodied systems in quantum
mechanics and chemistry: quantum mechanics *can't* handle more
than one or two atoms as once. chemistry can. They need to
remain separate, likely for a long time to come. Even quantum
computers with their theoretical ability to crunch larger
amounts of data more efficiently might not be quite enough to
handle chemistry via standard model up to chemistry. So it's
best they stay separate. There's some missing "connecting
pieces" between the major scientific disciplines (not so much
the minor ones) that need resolution and they're usually pretty
big reasons. But I think we can PROBABLY reduce the hundreds of
disciplines back down to the 5-10 we had 120 years ago.