"sole answer" is a correct and usable phrase in written English.
It is used when referring to the one, only, or ultimate answer to a question. For example, "The sole answer to his question was to leave immediately."
Money is not the sole answer to poverty.
Even in a crisis, where virtual meetings are the sole answer, the physical realm looms.
Many here said that, in the absence of American intervention, force was the sole answer.
For the developers of Blu-ray, a change in laser color wasn't the sole answer.
Dentists and periodontists often say the sole answer is constant cleaning, Dr. Loesche said, including cleaning that involves surgery.
Quite an accomplishment for a player who entered this season considered only a temporary fill-in, with little shot as the sole answer for the future.
While there are strong environmental and health reasons to reduce our dependence on animal farming and for the better-off to drastically cut meat and dairy consumption, we must resist the temptation to abstractly denote a universal vegetarian lifestyle as the sole or simple answer.
However, when the patients were asked which was the most painful area of their foot soles, they usually answered 'under the arch'.
But before you spurn a shirt made by someone like 8-year-old Kamis Saboor, an Afghan refugee whose father is dead and who is the sole breadwinner in the family, answer this question: How does shunning sweatshop products help Kamis?
As a sole proprietor, O'Reilly has to answer to a constituency of exactly one.
Future research using high-quality study designs and implementing vancomycin as the sole intervention are needed to answer this question.
