Sentence examples for difficult to prove whether from inspiring English sources

The study of autobiographical memory poses problems, because it is difficult to prove whether the events took place as reported.

One of the problems with whiplash is that it can be difficult to prove whether someone is suffering from the condition or not.

Although many agency executives complain it is difficult to prove whether mobile ads work, or demonstrate a return on investment for the clients, Mew says this could be a smokescreen for advertising types who are more comfortable with old media, particularly print and TV.

"The heart of the bribery case has been whether she was acting alone or on behalf of Mr. Necas, and now it will be very difficult to prove whether he was giving her directions," said Jaroslav Plesl, deputy editor of Tyden, a leading political magazine.

While the strategists say it is "statistically difficult to prove whether the bursting of the Nikkei bubble at the end of l989 and the bursting of the dot.com bubble in 2000 had anything to do with demographics, it does seem that markets can be prone to bubbles if the pool of potential investors grows" -- and can deflate just as quickly as retirees pull their money out of the market.

It is difficult to prove whether the numerically derived solution is global optimum or not because the problem is highly nonlinear.

With these kinds of cases it's difficult to prove damages, which would depend on whether or not the alleged cease-and-desist letter was actually responsible for the company losing distribution deals, he said.  .

The planning department has said this distinction is hard to enforce, because it's difficult to prove night-by-night whether a host was there or not.

Although most universities have now designed policies on proofreading and copy-editing for students – with many forbidding the use of such agencies, or requiring students to be open about using them – it's still difficult to prove and there is uncertainty about whether universities are willing to act.

Whether the vaccination campaign controlled the outbreak is difficult to prove.

Although the patient did not respond clinically to treatment with rifampin/streptomycin, whether the treatment also failed microbiologically is more difficult to prove.