"would certainly mean" is a correct and usable phrase in written English.
You can use it to emphasize that something has an important significance or implication. For example: "Winning the golf tournament would certainly mean a lot to him."
REAL reform of education would certainly mean annoying the more militant people in the teaching unions.
Any more cuts would certainly mean faculty layoffs, said Patricia Claxton, the college's chief financial officer.
Nothing would be more satisfying than to win in Europe with the team I love and it would certainly mean more than doing it with another club.
I'd say that such a tragedy would certainly mean Congress would do something about those weapons, but obviously that's not the case.
This could spread the popularity of the game even further; and it would certainly mean that staging the semi-final and final of the competition would be open to a far wider range of countries.
"I don't know if the drilling would hurt the forest so much, but having swaths cut out of it would certainly mean it would be less beautiful," Mr. Broz said.
It makes it difficult for him to persuade people that he can control it without a radical change in our relationship with Europe - which UKIP would point out would almost certainly mean leaving the European Union".
While 10 European Union countries do not use the euro, a disorderly exit would almost certainly mean that Greece would have to leave the union as well.
That would almost certainly mean the draft would occur at the end of this month in a vacuum, with no free agency surrounding it and the silence of the off-season filled only with debates about labor law.
But if the authority reopened negotiations with another bidder, it would almost certainly mean that it would get less money for the rights to the property, real estate executives said.
Playing games into February would almost certainly mean the combine would be moved back, shortening preparation time before the draft, which the N.F.L. likes in its late April slot.
