Which statement is false regarding ruleset validation?

The statement that rules in MyCo can reference rules in Claims is incorrect because, in Pega, ruleset validation enforces a hierarchy and dependency management between different rulesets. When establishing relationships between rules, the ordering of rulesets and their versions comes into play.

In Pega, a lower-level ruleset can access rules in a higher-level ruleset, but the reverse is not permitted. The ruleset called MyCo is at a broader scope that cannot reference rules defined in the Claims ruleset, which is designed to encapsulate a more specific set of functionalities or data rules. This aligns with Pega's ruleset structure, where referencing rules is typically limited to hierarchical or a defined order of access.

In essence, the integrity of the system is maintained by restricting ruleset references in such a way that higher-level rulesets are able to access lower-level ones, promoting modularity and better design practices. Thus, options that suggest referencing from broader to more specific rulesets would be true, while navigating from a specific ruleset to a broader one, as suggested in this case, would violate the ruleset validation principles of Pega.