Oh no. Definitely not. Humans would never just lie. They always lie only if they're biased. That is, after all, the definition of how a bias works.

/s

I'm using bias to mean hidden motivations to the benefit of other parties. Feel free to substitute a better word.

EDIT: actually I'm really not sure what hairs we're trying to split here. I see bias as a departure from objectivity. It can be conscious or unconscious, but when someone is selling something, it's frequently conscious and self-serving, and I believe that's referred to as a lie.