George is absolutely correct –
Human error occurs at all levels, and rarely alone.”
With this conclusion he might fare better to consider the examples of error in the article - hindsight bias in accident assessment and that of stereotyping pilots – “sublime to ridiculous” without providing supporting evidence.
This is an important subject, but not well served by an article on a web site which appears to promote commercial objectives over safety improvement.
I recommend that George reads
Perspectives on Human Error.
I have read and heeded the paper, lest I be accused of error as in Case 1.