[Lazamataz]

By that line of reasoning we should discount similar statements made by other people who are credible because one person made the same statement who is not credible.

Precisely!

If you can find one person who isn't credible who makes a statement of fact, that fact is automatically proven untrue.

[Man50D]

Precisely! If you can find one person who isn't credible who makes a statement of fact, that fact is automatically proven untrue.

You misunderstand my point. That is my fault for not explaining myself clearly so I'll rephrase my point. You make several assumptions.

1. You accuse Joseph Farah of not being credible but don't provide specific examples to cite a pattern of deception or inaccuracy.
2. Your accusation assumes someone who has not been credible in the past could never be credible in the future.
3. You assume anyone who is deemed not credible automatically invalidates the credibility of any credible person who independently reaches the same conclusion.