But this stirring and funny novel, with its compelling exploration of Britishness, loyalty and personal sacrifice, makes an entirely credible substitute for the facts.
He regularly proclaimed his allegiance to primal drives as the only credible substitute for meaning in a hostile universe.
He added that "none of this is a substitute for a credible political process".
But they say they are not trying to overthrow the elected government, and argue that they are not a substitute for a credible political opposition.
Electric power systems maintain system security by keeping instantaneous reserves that can substitute for a credible loss of generation.
Ed Miliband has been strongly supportive of the fee cut, placing a pressure on the shadow chancellor, Ed Balls, to find a credible way to find a long-term substitute for the consequent loss of income to universities.
With Borussia Dortmund dangerman Robert Lewandowski substituted, the Poles struggled to create a credible goalscoring chance until David Forde was forced to gather a Szukala header.
"They are a credible threat".
Finally, a credible 4G phone.
