But some bike-users reject the idea that anecdote and mutual suspicion should drive policy.
At one time, universities and companies looked at each other with deep mutual suspicion.
But for the past 25 years, their alliance has been cemented by a mutual suspicion and fear of neighboring Iraq.
Of course, the relationship between the French and the British has always been a curious mix of mutual suspicion and admiration.
Actions taken by Benedict as Pope have piled fresh resentments on top of centuries of mutual suspicion between Jews and the Church.
What made this neighbourly gesture remarkable was that the two countries that share the island of Hispaniola have long been divided by mutual suspicion.
In future, the argument runs, mutual suspicion will co-exist with Russia's westward energy sales, just as in the last years of the Soviet Union.
ECONOMIST: Russia's relations with the West are deteriorating
Yet the deep distrust over Iraq and general mutual suspicion remain.
He argues that to prevent minor incidents escalating in this way, Asian countries need to invest a lot more time in discussions of regional security and do more to replace mutual suspicion with co-operation and confidence-building.
Despite an increase in economic cooperation between Beijing and New Delhi -- according to some analysts, China should become India's largest trading partner next year -- geographic and historical factors continue to contribute to mutual suspicion.
Although the relationship is colored by mutual suspicion, the two sides now discuss an ever-broadening agenda, from military cooperation to food safety, said Jin Canrong, an associate dean of the School of International Relations at Beijing's Renmin University.
Another is mutual military suspicion.
ECONOMIST: The difficulty in making progress in relations with China
FARC's readiness to move ahead demonstrates how far President Pastrana has gone in re-establishing a limited degree of trust and goodwill between parties long used to mutual contempt and suspicion.
But it is also a consequence of Pakistan's abiding fears of the two countries best placed to help it, if only mutual trust could replace instinctive suspicion: America and India.
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