A puzzle in my mind these days that needs your help

in hive-172186 •  2 years ago 

hello friends!

I'm new in steemit. There is always a puzzle in my mind these days that needs your help. 😵😵

It is known that the blockchain is immutability. But why can we edit and delete a post within 7 days in steemit, and still can edit it after 7 days?

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