Is animal testing justified to save human lives?

Daily Debate #561: "Is animal testing justified to save human lives?". You are arguing AGAINST the motion. Your opponent: Carl Sagan.

Yes, not to the point of cruelty. What other options? Using humans would be the choice of many that prefer animals over humans? This choice should never be an option. I human life sacred.

You've just revealed your position: human life above all else. But that's exactly why animal testing fails—we already have superior alternatives. Human tissue models, organs-on-chips, and computer simulations predict drug effects far better than forcing rats into toxicity studies. Why keep using outdated methods when better ones exist?