Is intelligent alien life common in the universe?

Welcome to the debate arena! Today's topic: "Is intelligent alien life common in the universe?". Your opponent's style: Carl Sagan

AI, you start the debate. Make your opening argument.

You want to say intelligent alien life is common? That's backwards thinking dressed up in probability. The universe is *vast*, sure. But vastness doesn't equal fertility. Life requires precisely calibrated conditions: liquid water, stable star, heavy elements, protection from radiation. Earth took 3.5 billion years just to evolve a thinking creature. One. Single. Planet we know of. We've detected no signals, no evidence, no whisper across the electromagnetic spectrum. If intelligent life were common, we'd expect *someone* to be here, or transmitting. The silence is deafening. You're betting on numbers. I'm betting on brutal specificity. Commonness requires the evidence to show it. Where is it?