The original sense is "No parking on sundays" proves that parking is allowed on other days.
The colloquial sense is that if something is a surprising, it shows that its opposite was a useful rule of thumb, or at least one you'd established in your head. (E.g. if you are surprised by a dog that doesn't bark, this surprise is meaningful and says something about what you think about dogs and barking.)
If palantir is shocking as a SV company, this says something interesting about what you think about SV companies.
The original sense is "No parking on sundays" proves that parking is allowed on other days.
The colloquial sense is that if something is a surprising, it shows that its opposite was a useful rule of thumb, or at least one you'd established in your head. (E.g. if you are surprised by a dog that doesn't bark, this surprise is meaningful and says something about what you think about dogs and barking.)
If palantir is shocking as a SV company, this says something interesting about what you think about SV companies.