"I wouldn't believe him if he said the sun came up in the east"

This quote by Thomas Griffith indicates that the speaker does not trust the individual they are referring to. The speaker is implying that the person they are referring to is not reputable or trustworthy. The speaker is also implying that the individual they are referring to is not experienced or notified. The speaker is recommending that even if the individual they are describing stated something as apparent as the sun showing up in the east, the speaker would not believe them. This quote is a method of expressing the speaker's lack of trust in the individual they are describing. It is likewise a way of revealing the speaker's shock in the person's understanding or understanding of the world. This quote is a way of expressing the speaker's lack of faith in the person they are describing.