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used in Atlas Shrugged

only 1 use
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allowing passage through a barrier
The barrier can be physical or figurative — such as:
  • a membrane, asphalt or other material that is full of tiny holes that permit penetration by a fluid or gas
  • a border or other barrier that is not effective (for example, permitting illegal crossing)
  • an ineffective sports defense
  • a law or other rule that is full of loopholes
  • But the heart and meaning of the structure was a room in its cellar, deep under the ground; the room had been incompetently lined with the porous sheets of soundproofing material; the sheets had begun to crack and the naked rock of a cave showed through.
    3.9 Part 3 Chapter 9 — The Generator (64% in)

There are no more uses of "porous" in Atlas Shrugged.

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