The conclusion will not, however, delight Nasdaq, which has yet to prove conclusively that its electronic systems provide a superior marketplace.
We have not conclusively agreed, in 2015, that women have the right to walk the streets, wearing whatever they choose, without being shouted and whistled at.
Even if studies conclusively showed that 20, or 50, was the perfect class size, politicians couldn't click fingers and be done with it.
"If we prove conclusively that mindfulness can stabilise those individuals it would be a great benefit to society".
Given such a natural history, a "miraculous cure" in a case of multiple sclerosis would indeed be very hard to prove conclusively.
Saudi Arabia beheads smugglers of cannabis, a drug which is not conclusively linked to a single fatality among the 200m or so who use it each year.
This year's battle has been between two deeply flawed men: George Bush, who has been a radical, transforming president but who has never seemed truly up to the job, let alone his own ambitions for it; and John Kerry, who often seems to have made up his mind conclusively about something only once, and that was 30 years ago.
It was never conclusively proved how, though a contaminated sample may have been to blame.
Others have warned the new rules may be vulnerable to a legal attack, since the CFTC hasn't shown conclusively that excessive speculation contributes to rising commodity prices.
One is reminded of the famous American research study on pornography which proved "conclusively" that men get bored with it.
In his book "Stateless in South Asia: The making of the India Bangladesh Enclaves", Wilhelm Schendel chronicles futile attempts by politicians and two "self-absorbed bureaucracies" to implement a plan agreed soon after partition: first to regulate the rights of passage of the residents and then settle the matter conclusively by exhanging enclaves.
