Cyc contains both general and domain-specific knowledge. Here are some domain-specific rules that make use of Cyc's general knowledge about the world.

1. Chemistry
   If salts are created in some type of chemical reaction, then some type of base is involved in that reaction.
2. Computer Security
   If a computer network implements IEEE 802.11 Wireless LAN Protocol and some computer is a node in that computer network, then that computer is vulnerable to decryption.
3. Healthcare
   If an HMO provides coverage under some insurance plan, and the HMO provides "group" coverage (i.e., the coverage is provided via a "group" plan), and the insurance plan covers some medical care event, and the medical care event is performed as a service by some healthcare provider, then either the health care provider is a listed ("in-service") provider for the HMO, or the health care provider performs the medical care event as the result of a referral (sanctioned by the HMO).