A more thorough explanation:

Derivative title refers to a title that is obtained through a transfer of ownership from the original owner. For example, if John sells his car to Jane, Jane now has derivative title to the car. This means that Jane's ownership of the car is derived from John's ownership.

Derivative-use immunity is a type of immunity granted to a witness in a criminal case. It means that the witness cannot be prosecuted based on any information they provide in their testimony. For example, if a witness is granted derivative-use immunity and testifies that they saw John commit a crime, they cannot be prosecuted for any involvement in that crime based on their testimony.

Immunity is a legal protection that exempts a person or entity from certain duties, liabilities, or services. There are many types of immunity, including:

• Absolute immunity: complete exemption from civil liability, usually afforded to officials while performing particularly important functions
• Qualified immunity: immunity from civil liability for a public official who is performing a discretionary function, as long as the conduct does not violate clearly established constitutional or statutory rights
• Transactional immunity: immunity from prosecution for any event or transaction described in the compelled testimony
• Use immunity: immunity from the use of the compelled testimony (or any information derived from that testimony) in a future prosecution against the witness

These examples illustrate how immunity can protect individuals from legal consequences in certain situations.