The best reason why Deckard is NOT a replicant!

If Deckard is a replicant why would they use a less powerful, WEAKER model to find much STRONGER repliant models? In every encounter with the replicants Deckard is weaker. He is not as strong. He's almost killed by Leon - Rachael saves him by blowing Leon away! - and in the final battle Roy beats him up with ease. It's only Roy's inner humanity that saves Deckard. Roy realizes his life is about to end and he shows compassion. He lifts Deckard up from the edge of the building and drops him on the roof.

It makes zero plot sense to have a weak Blade Runner replicant chase much stronger ones. It's dumb story logic. PERIOD.

Ridley Scott can spend the rest of his life claiming Deckard is a replicant but he is wrong because it doesn't work in the original movie. It's a flawed idea because it makes no sense. And if they're going with Deckard as a replicant in the sequel - it's just as nonsensical. Deckard is now a 70 year old replicant?

What would be the point of an old, tired, replicant Blade Runner? He would be too old to stop the new replicant bad guys (assuming the villains in BR 2 are new younger replicants). It makes no sense.