Interest
Proportion of Hacker News items mentioning "impenetrable" over time.
Mentions
Total number of Hacker News items mentioning "impenetrable" over time.
In metaphysics, impenetrability is the name given to that quality of matter whereby two bodies cannot occupy the same space at the same time. The philosopher John Toland argued that impenetrability and extension were sufficient to define matter, a contention strongly disputed by Gottfried Wilhelm von Leibniz. Read more on Wikipedia