The phrase "doubtful without" is grammatically correct and can be used in written English.
It is typically used to describe a situation or circumstances in which something is uncertain or unsure without another factor or element. Here is an example: "The future of the project was doubtful without the support and funding from the government."
In previous years he was accused of publicizing doubtful results without checking them, and was criticized for research that contributed to a government campaign suggesting that Ecstasy made "holes in the brain".
We established a cut-off different from that recommended by the manufacturer to avoid doubtful results without decreasing the concordance between the results of the two tests.
A new cut-off was established (see additional details in the Results section) to eliminate doubtful results without deteriorating the concordance between the results of CFT (the officially prescribed test) and I-ELISA.
A new cut-off was established for I-ELISA in order to eliminate doubtful results without affecting the concordance between the results of CFT (the officially prescribed test) and I-ELISA.
After optimising the cut-off values in order to avoid doubtful results without deteriorating the concordance between the results of the two tests, the I-ELISA appeared to be slightly more sensitive than CFT (Se I-ELISA = 0.917 [0.822; 0.952], 95% Credibility Interval (CrI) compared to Se CFT = 0.860 [0.740; 0.957], 95% CrI).
He has discovered that the fat on starving bodies turns to a "translucent gelatinous substance" and that the meat such a body could yield would be of doubtful nutritional value without fat to accompany it.
Without Robbo doubtful, our hopes seemed greatly reduced, England's reliance on their Captain Marvel meaning we anxiously awaited updates and crossed fingers as the tournament neared.
While it may be argued that a K-L grade of 1 may correspond to early OA, the definition of this categorization states the doubtful presence of osteophyte without regard for joint space narrowing.
It's doubtful that he was completely without answers.
