The Logic of Catastrophe

Premise 1: AI development will advance to a transformative AI.
Premise 2: A transformative AI is capable of causing a global catastrophe.
Premise 3: If a transformative AI is unaligned, it will eventually cause a global catastrophe.
Premise 4: AI development advances to an unaligned transformative AI.
Conclusion: The unaligned transformative AI eventually causes a global catastrophe.