Premise: God does not exist
Observation: There is no evidence that God exist
Conclusion: God does not exist
Objection: The lack of evidence does not mean something did not happen or is not possible or does not exist.
Premise: Dark matter does not exist
Observation: there is no evidence that dark matter exist
Conclusion: Dark matter does not exist.
Objection: the existance of dark matter is still being investigated.
Premise: Life on other planets does not exist
Observation: there is no evidence of life on other planets
Conclusion: Life on other planets does not exist.
Objection: Not every planet in the Universe has been explored.
Premise: abiogenesis is impossible
Observation: the is no current mechanism to create life from non life.
Conclusion: abiogensis is impossible
Objection: abiogenesis occurred on Earth dispite humanities ignorance of how.
Just my own opinion.