Journalism at its best is guided by the search for truth and holding the powerful to account. This is not some academic exercise or noble goal. Resources abound for learning about how the news media takes seriously its commitment to accuracy.
An important starting point is the Society of Professional Journalists Code of Ethics, which lays out four commitments for journalists: seek the truth and report it, minimize harm, act independently, and be accountable and transparent. The SPJ website provides detailed guidance on work by the Code, and it gives good grounding for any person with questions about how journalists do their work.