I'd love to hear more. A) fake news is hard to define and agree upon B) different people will have different criteria definition and Venn diagrams of fake new

I'd love to hear more. A) fake news is hard to define and agree upon B) different people will have different criteria definition and Venn diagrams of fake news C1) many people and organizations start and distribute fake news knowing them to be such C2) many people and organizations start or propagate fake news while earnestly believing them Can you help understand how block chain or public key cryptography will help or address anything relating to fake news? Is there an underlying assumption that ascertaining identity will help? Because from my perspective majority of fake news are created and propagated by readily and eagerly identifiable people, whether potus or my cousin on Facebook and anything in between. In other words, today already I pretty much know who is relating any given piece of news. I may even know where or who originated them. It does not in the least solve the problem that my liberal and conservative, atheist and religious. Rich and poor, immigrant and local, technical and humanities etc neighbours have completely different parameters and selection of trust. Identifying the source helps not a bit with radically different selections of source. And then we get to "disagreeable" topics - how will block chain help those who fundamentally disagree on climate abortion religion economy foreign politics military basic income refugees healthcare rights etc. They will continue to pick and choose whatever our inherent bias is. There is this utopian notion that tech framework will solve a human problem.