The phrase "fundamental rationale" is correct and can be used in written English.
You can use it when you need to explain the main reasoning behind a belief or action. For example: "The fundamental rationale behind our decision is to prioritize the safety of our customers."
So how might we identify the fundamental rationale?
First, the White House move does not change the fundamental rationale behind most utility investments.
But it missed a fundamental rationale for continuing to train medical students in anatomy and dissection: that practice makes perfect.
The fundamental rationale of the international energy emergency system established in the 1970's was to protect economic growth.
To do otherwise jeopardises informed consent and is inconsistent with not only the science of placebos but also the fundamental rationale underpinning placebo controlled trials.
The Rev. Wright fiasco undermined the fundamental rationale of the entire Obama campaign — that it would be about healing, about putting partisanship aside, about reaching across ethnic and party divisions to bring people together in a new era of cooperation.
"When you start to ask what is the fundamental underlying rationale for tax exemption and the charitable deduction for donors, it leads to questions that are far more difficult to answer than questions about greater disclosure and better governance," said John D. Colombo, a tax-law professor at the University of Illinois who testified before Rep. Thomas.
Consequently, the results of the analysis indicated potential violations of the weak form of market efficiency, but could not be used to explain potential fundamental rationales for the profitability of trading strategies.
The key rationale for the study of model organisms in biomedical research is to examine fundamental mechanisms that may be shared by many or all living entities.
One difficulty with this "fundamental work" rationale for the whole-brain standard, a rationale that is intended to capture "what distinguishes every organism from non-living things" (ibid), is that present-day robots, which are certainly not alive, seem to satisfy the first two criteria.
