How strong is the author's logic?

• Does the evidence support the blogger's claims?
• Do the blogger's conclusions follow logically from the analysis?

What is the blogger's rhetorical purpose (e.g., to persuade, inform, describe)?

• Does the blogger's word choice and language expose this goal?
• Is more than one viewpoint fully represented and fairly considered?

How does this source fit?

• Does this add a different point of view?
• Does this make sense, given what I already know?