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I think this was a spam post. Or am I wrong ?

There is no way to delete it. It stays forever in the blockchain.

Hi! I am a robot. I just upvoted you! I found similar content that readers might be interested in:
https://www.mnn.com/green-tech/research-innovations/stories/10-optical-illusions-will-blow-your-mind

Cheetah will catch you right now. Very aggressive