 Such spectators are able to detect and explain failures of skill. A suitably backgrounded spectator who thereby understands the conventions and styles in play will know what to watch for. A performer will fail who does not exhibit the relevant features in voice, speech, mood, movement, or action. Such a failure may be a result of lack of skill. A spectator who understands performances and their features will not only notice this but will also be able to explain this failure due to lack of skill to other spectators.