FYI: I am not the OP who originally said that the "human brain is the most complex object in the known universe". I'm not interested in discussing complexity,

FYI: I am not the OP who originally said that the "human brain is the most complex object in the known universe". I'm not interested in discussing complexity, just the foundations of productive (and polite!) discussion and debate. So we'll go our separate ways here. I would probably agree with you with respect to the brain not being the most complex physical system.