Readers beware -- this particular taxonomy of robustness vs resilience is not a pervasive or even common one. Often these terms are used completely synonymously. And often they are used with different subtleties that distinguish them.

For example, some distinguish between the two terms in that robustness refers more to staying functional in the face of failures, where resilience refers more to the capability to work around failures (neither having anything to do in particular with whether the unknowns were unknown).

The blog post author says that this taxonomy come straight from David woods, so there's no problem. Just keep in mind that most people don't use these terms in this particular way.