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Generally, adhering to 'design' rules
EVALUATE WHETHER ADHERING TO DEISGN PRINCIPLES HELPS OR HINDS WORK AND/OR CREATIVITY
canon
[kan-uh n]
noun
1. an ecclesiastical rule or law enacted by a council or other competent authority and, in the Roman Catholic Church, approved by the pope.
2. the body of ecclesiastical law.
3. the body of rules, principles, or standards accepted as axiomatic and universally binding in a field of study or art: the neoclassical canon.
4. a fundamental principle or general rule: the canons of good behaviour.
5. a standard; criterion: the canons of taste.
6. the books of the Bible recognized by any Christian church as genuine and inspired.
7. any officially recognized set of sacred books.