The phrase "a plausible explanation why" is correct and usable in written English.
It can be used when discussing a reason or justification that seems reasonable or believable for a particular situation or phenomenon.
Example: "The researchers provided a plausible explanation why the experiment yielded unexpected results."
Alternatives: "a reasonable justification for" or "a credible reason for".
The study offers a plausible explanation why a vaccine like Hib might help.
The expansion of CAZy gene family, especially the xylan-degrading enzymes, provides a plausible explanation why Piromyces secretion showed limited substrate preference as compared to the commercial mixtures produced by Trichoderma and Aspergillus.
This is a plausible explanation why, despite one decade of severe refutation (Noubactep 2006, 2007, 2008, 2009a, b, c, 2010a, 2011c, 2015, 2016a, c, d), the theory that Fe0 is an environmental reducing agent has survived (Richardson and Nicklow 2002; Fu et al. 2014; Guan et al. 2015; Zou et al. 2016).
This offers a plausible explanation why IB12 aggregates larger than heptamers exclusively were found to grow by condensation type reactions.
The detection of the fatty acid hydroxylase motif in this sequence gave a plausible explanation why purification attempts had failed so far.
The dense and irregular structure of pedigree relationships between application and training FS families is a plausible explanation why none of the three measures of genomic relatedness provided a regularly spaced sample of relatedness.
A mechanism like that operating in PDT seems to be a most plausible explanation why Finsen's therapy worked.
We have no plausible explanation why the lack of acC in tRNAMet caused a growth defect at low temperatures in the absence of dihydrouridine.
They weren't much help, but, as the video below shows, Lydic did manage to uncover the most plausible explanation why so much wacky news comes out of Florida.
Bax and Bak can in many situations have the same activity and replace each other, and there seems no plausible explanation why we have two effector proteins that act exactly the same way.
But he said his finding put the onus on Mr. Matter to provide a plausible explanation for "why the patterns are different and why they're varying".
