R29:60.

He will admit and accept his own errors when proven obviously wrong and refrain from distorting or altering the facts in an attempt to justify his decision.

[See Codes 1(b)., III.1.a. ]

Code is relevant when:

Engineer is proven wrong or knows he is wrong with respect to a particular action

Code is violated when:

Engineer does not admit and accept his own errors related to the action
OR
Engineer distorts or alters the facts in an attempt to justify his errors related to the action

Code is not violated when:

Engineer admits and accepts his own errors related to the action
AND
Engineer does not distort or alter the facts in an attempt to justify his errors related to the action