When I read “can be verified as meaningful” I interpreted it as “all expressions of CQL can be meaningful,” which caused confusion when I got to the example of a meaningless expression.

Existing Wording:

As a result, any given expression of CQL can be verified as meaningful, at least in terms of the operations performed. For example, consider the following expression:

Proposed Wording:

As a result, any given expression of CQL can be verified as meaningful or be determined meaningless, at least in terms of the operations performed. For example, consider the following expression: