Possible to use a rule as a fact in another rule?

We're working on better decomposing our facts and rules, and have found that (due to our data model hierarchy), we're having to re-stipulate the same facts in multiple rules. Is it possible to use a rule as a fact in another rule so we can avoid having to copy/paste fact statements into multiple rules which is tedious and error prone?

For example, if Rule 1 states that _FieldA must be true_, and Rule 2 states that _Field A must be true and Field B must be false_, is it possible to construct Rule 2 such that _Rule 1 must be true and Field B must be false_?

The issue names no files, tests, or entry points. Start by locating the rule and fact evaluation paths, then clarify how a rule referenced as a fact should be evaluated; done means Rule 2 can reuse Rule 1 without duplicating Field A and existing behavior remains covered.

Written by the indexing model from the issue text.