Aluminum is also impervious to oxygen, which causes coffee to lose its flavor over time.

Not unlike the man who would later offer him a Cabinet position, the candidate seemed impervious to criticism, positioning himself as someone who was delivering inconvenient truths to an unyielding establishment.

“We have to have a larger portion of our groundwater recharge coming from managing rainwater, in getting rid of impervious surfaces and letting it infiltrate,” Winter said.

Existing regulations, it says, are “ineffective, costly, opaque, and largely impervious to reform.”

Providence’s alleged actions suggest that state laws protecting abortion rights are not impervious — and that would especially be so if Republicans regain the White House and control of Congress in the coming election.