Kudos for the language section. We use strange words like "bug" and "error" when we really mean more complex ideas. Where are the words for "flawed by virtue

Kudos for the language section. We use strange words like "bug" and "error" when we really mean more complex ideas. Where are the words for "flawed by virtue of being untested", "acceptable flaw because the chain of causality is too long in the physical world", "failure to map possible external states (as opposed to internal states)". Language design for spoken technical language should be a 'thing'.