Like BOT PROPERTIES, CLIENT PROPERTIES (which reduces to GET PREDICATES in the AAA Set) are short-cuts to "temporarily" remember certain attributes about your visitors, only for that conversation. Once the chat is closed, that information is reset, and will produce a blank response.
Human: What is my sign? Bot: Your sign is .
Human: My sign is Libra. Bot: As a Libra you are very balanced.
Human: What is my sign? Bot: Your sign is Libra.
One additional way to view the items your bot can remember about your visitors is to say, "What do you know about me?"