Which principle reflects all current interests in property?

The mirror principle is the correct choice because it embodies the idea that the ownership and interests in a property are accurately reflected in the official records. This principle ensures that all current interests, such as ownership, liens, and other rights associated with a property, are transparent and easily verifiable through legal documents and public records.

In practice, the mirror principle supports the concept of title certainty, meaning that a potential buyer or interested party can rely on the recorded information to understand all claims and interests in a particular property. This is crucial for protecting the rights of property owners and facilitating transactions.

The other options, while relevant to the real estate field, do not address the concept of reflecting current interests in property as directly as the mirror principle does. The curtain principle tends to deal with the idea of eliminating certain interests from public view, the insurance principle relates to the protection against risks associated with property ownership, and the survey principle is focused on measuring and defining property boundaries rather than interests. Thus, the mirror principle stands out as the foundational concept in ensuring that property interests are consistently documented and accessible.