When we seek out and use only evidence that confirms our views, we are guilty of ...?

When we do this we are guilty of Confirmation bias.

In another words, it is when we search for information that just confirms our thoughts or hypotheses. An example of this situation would be if we are arguing that global warming does not exist, and to demonstrate this, we search Google's information "why global warming is false", then we are looking for a source that agrees with us.