It does not offer conclusive proof that this is causing a rise in asthma.
After all, there is little conclusive proof that Bigfoot is anything but a myth.
But there has never been conclusive proof there are big cats roaming wild in the countryside.
So, if Iraq is concealing something nasty, perhaps only a defector will provide conclusive proof.
It would also undermine the claims of the separated-twins studies to offer conclusive proof of what genes do.
Yet banking regulators wait for conclusive proof of danger ahead before they act.
Despite years of research, there's still no conclusive proof cell phone radiation causes cancer and other health problems in the brain.
He also said that India would only talk to Pakistan when it had conclusive proof that infiltration had ended for good.
But those behind the project are eager to point out that they may never have conclusive proof of the body's identity.
There is no conclusive proof that Celebrex works as a preventive drug for anything other than a rare genetic condition that can lead to colorectal cancer.
Citing insufficient scientific evidence, they argue the government should not regulate this issue until there's conclusive proof that workplace ergonomics actually cause (or can remedy) musculoskeletal disorders.
CNN: OSHA pushing for new regulations aimed at preventing repetitive motion injuries
That's not conclusive proof, but it does look like the boost has a lot to do with the pressure to find something to do when jobs are hard to find.
An Android app developer has published what he says is conclusive proof that millions of smartphones are secretly monitoring the key presses, geographic locations, and received messages of its users.
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Any conclusive proof of the condensate would have an impact both on how we understand particle production in collisions as well as the ways gluons and quarks are arranged inside protons.
ENGADGET: Large Hadron Collider may have produced a previously undetected form of matter
Independent reports by military aviation experts, a fatal accident inquiry in Scotland and other investigations had all concluded that there was no conclusive proof of what caused the accident, he said.
The UUP's Mike Nesbitt said he had examined a report on the horse mussels by Queen's University Belfast and could find no conclusive proof that the problem was caused by any current legal activity.
From the private sector, Steve Corneli, senior vice president for sustainability, strategy and policy for NRG Energy, attempted to blend free-market principles with an unquestioning belief in claims by climate-change advocates that have yet to be backed up with conclusive proof.
FORBES: The Corporate Sustainability Dilemma: Policy or Pragmatism?
But in order to believe that the Iranians are fundamentally different from any other country that has acquired nuclear weapons (including the Stalinist Soviet Union and Maoist China) I would need to see some pretty conclusive proof, not the half-assed list that Steyn has assembled.
FORBES: Mark Steyn Doesn't Understand the Soviet Union, Containment, or Nuclear Deterrence
The pay-TV industry has talked about cord cutting for quite sometime now, and although there is no conclusive proof yet available, many argue that emergence of Internet video and satellite providers like DirecTV and Dish is likely to lead to consumers drop pay-TV services.
But those close to the project say that with or without conclusive DNA proof, the circumstantial evidence alone is striking.
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