A recent experiment seems to give a clear demonstration of this effect.
It's a clear demonstration of how we prefer to keep costs down.
He was also alone a clear demonstration of trust.
We also look for a clear demonstration of commitment to corporate social responsibility.
This was a clear demonstration that elections in Venezuela had to be won by the right people or else.
There has never been a clear demonstration of cause and effect.
Isn't this whole debate about the 50p rate a clear demonstration that we structure society to benefit the rich?
It was a clear demonstration that all participants are part of the European family.
But Iraqis need a clear demonstration that security and rebuilding is possible.
But it is a clear demonstration of broad disappointment in the government.