The phrase "a rationale why" is grammatically correct and can be used in written English.
It is a common way to introduce the reason or explanation for something. Example: The company decided to implement a new policy, but employees were not given a rationale why. This lack of explanation caused confusion and frustration among the staff.
I could come up with a rationale why any of the nominees could win.
Professor Bar-Yam said he saw that Hunter College High School's students were returning from vacation during the period of the data collection, and said that "this provided a rationale" why Hunter could be the source of the posts.
These findings provide a rationale why idebenone can be protective in disorders associated with impaired complex I function but normal levels of CoQ10.
Thus, our data provide a rationale why hematopoietic CD34+ cells from CB and adult sources have a higher reprogramming efficiency than fibroblastic cells, as observed previously when retroviral vectors were used.
The advantage of having a UV-induced DNA-repair mechanism in species that develop in a protective egg-shell or inside the mother's uterus is probably low, which could give a rationale why mammals, snakes or birds have lost Cry5.
What is also surprising is that the authors chose to ignore the apparent discrepancy between the two strains, and furthermore go on to perform additional experiments where they either chose OR (Fig. 4, 5) or CS (Fig. 6, 7) without really justifying or giving a rationale why they included a particular control strain rather than the other.
This observation is entirely consistent with that of Dunbar [ 40] who suggests a convincing rationale why the HADS is not a highly discriminative instrument in some populations is because the HADS-A and HADS-D sub-scale scores are contaminated by overlap between the three underlying factors.
The high cost of complications is a good rationale why national governments should invest on hypertension treatment in order to gain savings from long-term care.
The adverse impact of stress, coupled with urbanization and weak health infrastructure provide a good rationale why systems-thinking approaches could be essential for the effective management and optimal hypertension in West Africa.
But they added up to an existential question mark rather than a rationale for why he should be president.
"I hugely respect anyone who has principles and has a rationale about why they will or won't do things.
