Which principle emphasizes expressing opinions on engineering subjects only when fully knowledgeable of all relating facts?

The principle that emphasizes expressing opinions on engineering subjects only when fully knowledgeable of all relating facts is centered on the responsibility engineers have to communicate accurately and ethically with the public. This principle underlines the importance of honesty and integrity in professional judgments, ensuring that engineers do not mislead or provide misinformation to non-expert audiences.

When engineers engage with the public, they must recognize that their statements can significantly influence public perception and decision-making regarding engineering and technology. Thus, being thoroughly informed and aware of all relevant facts before making a statement is crucial in maintaining credibility and safeguarding public welfare. This commitment to knowledge and truthfulness reflects the ethical standards expected in professional engineering practice, advocating for the dissemination of reliable information in matters that affect society.

The other principles, while important in their contexts, focus on the relationships engineers maintain with clients, colleagues, or the profession itself. They address obligations and ethical considerations relevant to those specific interactions, rather than the broader responsibility to the public at large.