Manslaughter would not be difficult to prove but for Florida's "stand your ground" law.
It is indeed difficult to prove climato-sceptics wrong without referring to obscure science work.
Together, the two may have prevented a full-out depression, but hypothetical situations are notoriously difficult to prove.
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The other kind of sexual harassment, which is more difficult to prove, is quid pro quo harassment.
It has previously proved difficult to prove national jurisdiction because pirate attacks usually take place in international waters.
This is difficult to prove, since the police do not keep statistics about the religion of those they encounter.
But this phenomenon is difficult to prove since the extent of crowding out will vary with the economic cycle.
Because these kinds of benefits show up only in big population studies, they will be difficult to prove beyond a doubt.
Meantime, some business people report that incoming aid is being siphoned off and sold, but that's difficult to prove, the reporter says.
Heart attack rates in the study may be so low that it will be difficult to prove any difference between drug regimens.
Since it will be difficult to prove that fraud drove down a stock's price, they might be able to hide from scrutiny.
It is thought that prosecutors decided against this because insider trading would have been too difficult to prove in a criminal case.
In practice, however, it is difficult to prove that an asylum seeker showing up on Britain's doorstep first entered Europe through France.
Legal experts say the issue is rarely pursued partly because it is difficult to prove how overlapping directors impinge on business decisions.
It is difficult to prove exactly what happened without any video coverage.
There are suggestions that unemployment can even lead to cardiovascular disease, although it is difficult to prove that job loss causes heart damage.
An analogy here would be trying to prove that brand advertising results in greater revenue, it intuitively makes sense but is difficult to prove.
"It would be extremely difficult to prove damages for 'lost innovation, ' even if there are damages, " says New York University law professor Eleanor Fox.
At some point in the near future, it will be very difficult to prove to a computer that we are human and not a bot.
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But researchers doubted whether the syndrome really existed and argued that even if it did, it would be difficult to prove that the drug worked.
First, it has historically been difficult to prove unfair labor practices.
Prosecutors may have determined that an intent to harm others would be too difficult to prove in court, and so they offered him a plea agreement.
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Given how much cancer already exists in the world, it would be very difficult to prove that anyone's cancer was caused by the incident at Fukushima Daiichi.
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One reason for Sherwin's success: In a classic tort case--this defendant injured that plaintiff--it's very difficult to prove whose paint is on the walls of an old house.
It is difficult to prove - for prosecution or defence - that, in the face of these uncertainties, an individual cot death was either definitely due to abuse, or definitely not.
Jonathan Kent says research has linked growing commercial pressures on children to higher rates of depression, lower self-esteem and to mental health problems but that it is very difficult to prove such a link.
Critics of the new law are concerned it's too difficult to prove whether someone has been careless or not but the government hopes it will act as a deterrent to make people take more care on the roads.
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Professor Malcolm Parker, and Dr Jan Brosens from the Institute of Reproductive and Developmental Biology at Imperial College, London, wrote in an accompanying commentary that it was still difficult to prove a link between dioxins and human disease.
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