Sentence examples for and difficult to prove from inspiring English sources

Pursuing any action could be costly and difficult to prove without a prior contractual agreement.

A photograph, for example, constitutes hard (i.e., reliable) intelligence, whereas the report of a secret agent may be speculative and difficult to prove.

And they cautioned that securities cases, especially those where companies appear to have manipulated accounting rules to inflate their earnings, can be complicated and difficult to prove.

"Disparate impact is a problematic legal matter and difficult to prove," said Roger Clegg, general counsel for the Center for Equal Opportunity, a right-leaning group that opposes affirmative action and bilingual education.

As against the simple rule that permits all and only deals that elicit the voluntary consent of the participants, the rule forbidding discrimination is costly to administer and enforce, charges of discrimination being easy to make and difficult to prove.

"Human trafficking is extremely lucrative and difficult to prove and the bad guys are starting to realize that.

While the inequality on the left in (1.6) is relatively simple to prove, the one on the right appears to be deeper and more difficult to prove from the perspective of [23].

Previous studies have documented patients with serological evidence for concurrent leptospirosis and scrub typhus [20], but the putative situation in which patients have more than one infection but negative diagnostic tests for leptospirosis is speculative and extremely difficult to prove.

The problem is that the transgenerational inheritance of epigenetic controls is not well understood in any multicellular organism and often difficult to prove.

In the past, money laundering had only been considered a crime if it involved narcotics trafficking, and cases were difficult to prove.

Mr. Bharara has said that complex financial fraud cases, like the four-year-old Credit Suisse investigation, take time to build and are often difficult to prove.