"questionable hypothesis" is correct and usable in written English.
You can use it when you want to state that a hypothesis, or an idea, is arguable or debatable, or could potentially be wrong. For example, "The scientist made a questionable hypothesis about the origin of the species."
These apprehensions are common among many scientists, partly driven by publications like Kiriakidou et al[ 1], where misapplication of powerful computational methods yields questionable hypotheses that lead to incorrect conclusions.
Finally, such estimates, which have the merit of integrating the effects of evolutionary forces over longer time scales than direct approaches, rely on the questionable hypotheses that dispersal is stable over time and that the migration drift equilibrium has been reached.
But to test out a questionable social hypothesis, proposed and enacted by older people who would no doubt find an excuse to themselves be exempted?
A re-evaluation of the various components of acid base balance made highly questionable the hypothesis that bone alkali mobilisation is an important process in maintaining a stable low level of serum bicarbonate in chronic metabolic acidosis.
Establishing the statistical significance of a network property, mediated through a common, yet inappropriate reference frame, may result in the erroneous detection of significant properties, leading to questionable biological hypotheses.
Question questionable sources.
In summary, it is questionable whether the hypotheses related to the toxicity of oligomeres or protofibrils address the key issues leading to neurodegeneration.
The current approach of modeling drugs to minimize "uncoupling" on the basis of erstwhile hypothesis stands questionable, considering the ideas brought forth in this work.
However questionable or believable the hypotheses in Room 237, it has to add to the penetrating legacy of Stanley's films, which encourage thinking and hopefully, multi-level filmmaking.
