The parser through which the player communicates to the actors is also notable for its ability to recognize and accept a large number of complex commands and respond to them adequately. Many questions can be fully parsed by the engine and the actors can respond in a variety of ways dependent on their mood, random fluctuations, and the player's past actions. For example, in one scenario, Grace may respond favorably to the statement 'I love your decorations.', while in another context she may believe you are being condescending to her. Although not every statement made by the player will be successfully parsed, often the engine will pull related information and integrate it using the built-in voice acting clips. As such, proper spelling and grammar is almost always required for optimal player experience.