The truth only has a liberal bias if you are such a rigid idealogue that you think your own belief system is the absolute truth.
I could point to arguments where liberals embarassed themselves when it comes to science, and your response would be to point to arguments where conservatives embarassed themselves when it comes to science, and we we would end up exactly where we are right now.
I used to be 100% positive that my version of the truth was the truth, just like liberals. At some point life takes a toll on you, and you realize you werent as infallible as you once thought you were, anyone whether conservative or liberal, who assumes their ideology is the absolute truth, simply hasnt grown up yet.