Sentence examples for an impregnable system from inspiring English sources
The book by Peter Harris, who was the head of the official election monitoring division, says the hacker got into what was thought to be an impregnable system.
The first task would be to jettison the idealistic nonsense of the organism as an isolated, genetically impregnable system, a culture of one' (p. 218).
In the 1930s French military engineers designed and constructed the Maginot Line, a supposedly impregnable defensive system protecting France's common frontier with Germany and Luxembourg.
An impregnable theory, or one nearing the limit of impregnability, is in fact as great an absurdity as an impregnable armour-plate.
But they have also benefited from an impregnable competitive position.
His knowledge was flawed, but substantial — an impregnable fortress.
These points, I think, are an impregnable answer to the charge of anti-Semitism.
Inside of this haven, the two of them had built an impregnable fortress of their own.
However much a mirage, the image of an impregnable "fortress" has swayed sentiment and shaped policy.
On taking over, Mr Martin enjoyed an impregnable majority in a parliament only three years old.
He entered Parliament only in 2001 as MP for Epsom and Ewell, an impregnable Tory stronghold.
