The phrase "a justification for why" is correct and usable in written English.
It can be used when explaining the reasoning or rationale behind a particular action, decision, or belief.
Example: "The report provides a justification for why the new policy was implemented, highlighting its expected benefits."
Alternatives: "a reason for why" or "an explanation for why".
Furthermore, some studies combined utilities from a range of different sources, without providing a justification for why, or an explanation of how.
Since everyone needs a justification for why his or her work is the most important, I decided that the detector folks are the heroes; the data analysis that comes afterwards is tedious, but easy, so I stayed with detectors.
He parades around his wealth and uses it as a justification for why everyone of lesser wealth is a "loser".
According to Rashad Robinson, executive director of Color of Change, criminalization occurs when the media consciously or unconsciously creates a justification for why people of color are killed.
Most inexplicable is the first-act debate that the evil Theodore Galloway (John Benjamin Hickey) and Optimus Prime engage in, which ends up becoming a justification for why the US should stay in Iraq forever.
For example, in one study, Bob Cialdini and colleagues found that seeing other people litter in a dirty environment increased individuals' likelihood of littering because it provided them with a justification for why littering in this context is acceptable ("If she does it and everyone else seems to do it, it must be fine for me as well").
There is not a record of who put these funds into the bill, nor any justification for why this amount and why now.
For example, the methodology section of many studies does not include a pedagogical justification for why a particular technology was used or details about the design of the learning activity itself.
And, despite his rhetorical obsession with "efficiency" elsewhere, he doesn't even offer a substantive justification for why defense should get a free pass, or why national security requires us to spend four hundred billion dollars more each year than we did a decade ago.
We used a random-graph theoretic framework to derive a theoretical justification for why our approach works well in practice.
We present a theoretical justification for why the simply extended Rev degrades the LDR images and Cnv improves its quality for type B images.
