Which technological advancement significantly improved the reliability of scientific equipment product reviews around 2015-2016?

Product reviews have become essential tools in scientific equipment purchasing decisions. But how these reviews are processed and weighted by major scientific equipment retailers has evolved dramatically. This poll tests your knowledge of the algorithmic development that changed how scientific product reviews are analyzed and presented to customers.

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Natural Language Processing (NLP) that could detect fraudulent or incentivized reviews
Blockchain verification of reviewer credentials
Quantum computing analysis of reviewer behavior patterns
Augmented reality demonstrations replacing traditional text reviews