The phrase "a possible theory" is correct and usable in written English.
It can be used when discussing a hypothesis or explanation that may or may not be valid or proven.
Example: "After reviewing the evidence, we concluded that a possible theory for the phenomenon is that it results from environmental factors."
Alternatives: "a potential explanation" or "a plausible hypothesis."
At a Senate estimates hearing in Canberra on Tuesday, Peter Foley from the Australian Transport Safety Bureau outlined a possible theory – which he stressed was one of many – for the plane's disappearance four years ago.
He said it was akin to "a judge who accepted a bribe and said, 'Well, I did a couple thousand cases where I didn't accept a bribe.' " But Mr. Churchill testified that he was merely raising the idea of Captain Smith's involvement in the spread of smallpox as a possible theory that warranted closer examination, perhaps to be hashed out in the world of academics.
Though he readily admits that CMC formulations are outmoded in the contemporary theoretical landscape, he nonetheless insists that given the lack of experimental evidence one way or the other, it stands as a viable route to quantum gravity, and therefore presentism remains as a possible theory of time that is compatible with frontier theoretical physics.
A possible theory why extra-pair fertilization occurs is that female organisms select males with overall high heterozygosity or dissimilar genetics from themselves.
While every person connected to the case has a possible theory, one thing is certain: Whatever happened to Brian Barton is as much a mystery today as it was nearly a decade ago.
A possible theory on how B cells can contribute to chronic GVHD is that the reconstituted B cells after myeloablative conditioning may have impaired immune tolerance of peripheral B cells, leading to the production of autoantibody in chronic GVHD.
A second possible theory is that the plasma miRNAs might also be released from normal tissues by unknown mechanisms (Ribeiro-dos-Santos et al, 2010; Zen and Zhang, 2010; Reid et al, 2011).
Now it is trying to undercut all possible theories the defense might raise.
We wanted to exhaust all possible theories.
They suggest a few possible theories, including: Any other theories, readers?
There's no consensus, but political scientists have a few possible theories — including, as it turns out, the Ronald Reagan effect.
