Possible sins of commission blind us to the preceding sins of omission. (gse.harvard.edu)
The unions - namely the American Federation of Teachers (AFT) and the National Education Association (NEA), plus their various local satellites - stand in the way of professionalism through sins of both commission and omission. (educationnext.org)
Fake news was not only a sin of commission, but also one of omission: For - profit wire services would refuse to cover social issues, from labor protests to tainted meat, in ways that would depict their powerful patrons in a negative light. (businessinsider.com)