"It would be better not to have a summit at all than to have a summit that doesn't lead to substantive change," he said.
The question for Western capitals is whether a more conciliatory approach can lead to substantive change in the conflict with Iran over its nuclear program.
Government sources emphasise the fact the ministers have announced a pause in the legislation, and a commitment to reflect, which Mr Clegg has already said will lead to substantive change.
They have not been fully implemented and have not led to substantive changes in the way services are delivered or in the patient experience of those services.
These ADHD numbers are disturbing, but my 20 years' experience in what's been called "the Ritalin Wars" tells me that nothing leads to substantive change except the deaths of children.
The above three panelists' efforts were both, and are already leading to substantive change.
More research is needed that allows for comparison of EMA and global self-report measures to determine whether better measurement of change processes might lead to substantive modifications in understanding the change process, especially regarding moderators and mediators of AUD treatment.
"Cognitive enhancement," they write, "unlike enhancement for sports competitions, could lead to substantive improvements in the world".
This incentive would create a huge differentiator for Twitter and lead to substantive promotion of her Twitter service.
