The phrase "a strong reason why" is correct and usable in written English.
It can be used to emphasize the significance of a particular reason or justification for a statement or action.
Example: "There is a strong reason why we should invest in renewable energy sources: they are essential for combating climate change."
Alternatives: "a compelling reason for" or "a significant justification for".
All three listed Mr Bush's fiscal irresponsibility as a strong reason why the president should be kicked out of the White House.
But there is a strong reason why the People's Republic will want to keep involved, in the form of its long-running struggle against Uighur Muslims in its huge western territory of Xinjiang.
England have a chance of competing well in the coming weeks but it would take a huge leap of faith to see them in a position to win, and the lack of bowling variety is a strong reason why.
Even if she was really just 'saying angry words', we cannot see a strong reason why she should be forgiven and get legal immunity.
The importance of regular exercise for persons with RA is however a strong reason why this question should still be included in the MDHAQ [ 40].
This could be considered as a strong reason why metal-on-metal bearings are linked to elevated serum levels of alloy components but nevertheless do perform well clinically with respect to overall production of wear and frequency of aseptic loosening.
Think about the fact that having an in-office lover could derail your career––a strong reason as to why you should keep a lid on your affection.
As Caesar argued, "I regard the lenience of our ancestors as a very strong reason why we should not adopt any new measures of severity".
The difficulty in ensuring adequate access to health services in such communities where "market-based" provision does not result in the equitable provision of health care is one strong reason why defining a set of core PHC services is so important.
On one hand, this would suggest that there may be no strong reason why ALMPs should work less well in some countries than in others.
The prohibitionist lobby have been playing this card every few years since the 1920s and, even if it were true, this would be another strong reason why cannabis possession and supply should be legal and regulated, so that quality and supply could be monitored and use by young children eliminated.
