“known” means that the actuary had actual knowledge of the item-in-question – at the time the actuaryrenderedactuarial services. This definition recognizes the fact that actuaries must [often] rely upon the principal (as well as the principal’s agents) in order to supply relevant information.
Congratulations! You're now Froogled Up™ on what "Known" means!
Feel free to use it throughout your financial/insurance life.