Its chances of passing the Senate are considered dubious at best.
The latest account from 1834 is considered dubious, so it is probable that the species became extinct prior to 1800, and may have become extinct in the wild even earlier.
This bold queen sortie, to snatch a pawn at the expense of development, had been considered dubious, but Fischer succeeded in proving its soundness.
Needless to say, Barris's stories of moonlighting as a government hit man are considered dubious by many, and the CIA itself has given his claims the official governmental designation of "horse puckey".
General Musharraf captured power in a bloodless coup in 1999 and won a five-year term as president in a 2002 referendum that many considered dubious.
Even the A ring's Encke gap, reported in 1837 by the German astronomer Johann Franz Encke, was considered dubious for well over a century until it was confirmed in 1978 by the American astronomer Harold Reitsema, who used measurements of an eclipse of the moon Iapetus by the rings to improve on normal Earth-based resolution.
In Nature, Teller attacked the theory ("A severe climatic change must be considered dubious rather than robust"), and offered this sermon: "Highly speculative theories of worldwide destruction — even the end of life on Earth — used as a call for a particular kind of political action serve neither the good reputation of science nor dispassionate political thought".
The former were considered dubious in various ways, the latter turn second order logic into set theory.
However, Chesbro's induction is considered dubious, as his overall career was overshadowed by his 1904 season.
Many hypothetical extinct macaws were based only on contemporaneous accounts, but these species are considered dubious today.
