The phrase "a common explanation why" is correct and usable in written English.
It can be used when discussing reasons or justifications for a particular phenomenon or situation.
Example: "There is a common explanation why people tend to procrastinate, which involves fear of failure."
Alternatives: "a frequent reason for" or "a typical rationale for".
If there is an explanation of this similarity to be given it seems it could go in one of three ways: either the structure of thought explains the structure of reality (a form of idealism), or the other way round (a form of realism), or maybe there is a common explanation of why both have the same structure, for example on a form of theism where God guarantees a match.
(Male GP specialist, 21 years of experience as a GP) A common explanation for why it is difficult to say no was the need for social approval.
A common explanation for why there are differences in participation in peer discussion follows a student deficit model: "lazy or unmotivated students" do not pull their weight in the group, such that the high-achieving students do all the work.
We might then say that existence is not a property and mean by this that it does not follow from the fact that two things exist that there is a common explanation as to why they exist.
On the other hand, when we say that two things share a property F, we often mean more than simply that they are both F; we mean in addition that there is intuitively a common explanation as to why they are both F. It is in this second sense in which deflationists are denying that truth is a property.
A common explanation is confirmation bias.
Some morphogenetic tissue movements and the sorting out of embryonic cells may have a common explanation.
Indeed, testing is a common explanation for many of his obscure questions.
When Murray and the team spoke with workers, fear of retaliation was the most common explanation for why they hesitated to report harassment to their employer or the Equal Employment Opportunity Commission.
