They felt that there is an inexpugnable truth of religion.
"Edward Caldwell Moore Outline of the History of Christian Thought Since Kant"
Edward Moore
Think of their ancient religious philosophy-their doctrine of world-unity-absolutely foundational and inexpugnable, the corner-stone of all metaphysics, science, and politics, and of the latest most modern democracy; and still realized and believed in in India as nowhere else in the world.
"The Healing of Nations and the Hidden Sources of Their Strife"
Edward Carpenter
Then, there are some gratuitous and unredeemed vulgarities; some images whose barbarity makes us shudder, of creeping ascarides and inexpugnable tapeworms.
"Burke"
John Morley