The phrase "plausible rationale" is grammatically correct and commonly used in written English.
It refers to a logical and believable explanation or justification for something. Example: The politician's decision to cut funding for education seemed to lack a plausible rationale, causing outrage among parents and teachers.
Each of these offices certainly has a plausible rationale.
Or, the Administration had better come up with a fresh & ideologically plausible rationale for continuing involvement there.
The most plausible rationale for these observations is the formation of syngas by the partial oxidation of methane.
What adds to the awesomeness of the whole phenomenon is the absence of any halfway plausible rationale.
The present treatment offers a new and plausible rationale for the development of abnormal grain growth from uniform grain size distributions containing unstable particles.
However, the issue of cost and state deficits was successfully leveraged to provide a superficially plausible rationale for the transition to workfare regimes.
Canellas, who was the firm's director of finance, said that he made numerous false accounting adjustments in order to keep the firm in compliance with its loan agreements, and that he and Joel Sanders, the firm's chief financial officer, discussed "plausible rationales" for the adjustments that would satisfy the auditors.
(Plausible rationales were cooked up to make each type of expectation seem believable).
It does not help that there is now a New Age cottage industry devoted to notions of "quantum consciousness", claiming that quantum mechanics offers plausible rationales for such things as telepathy and telekinesis.
Other plausible rationales for a continued price rise exist.
And while it's difficult to pinpoint the cause(s) of low protester turnout, there are some plausible rationales.
