According to Google, EAT is not a real thing that exists in the world. EAT is comprises of various algorithms, baby algorithms made in the Google core algorithm.
Meaning of EAT:
EAT refers to expertise, authority, and trustworthiness. Each alone word has various algorithms present to determine various indicators of measuring the authenticity of the site. It may indicate in many ways such as Pagerank, the content accuracy and many more.
Garry Illyes stated that SEO might be in confusion state. There is not any EAT score. There is not a single EAT score. All this might create great confusion but EAT is a mixture of various algorithms.
Tweets After Garry Illyes Statement:
— Grant Simmons (@simmonet) October 10, 2019
Q. Is there an EAT Score for your website?
— Kristine Schachinger (@schachin) October 10, 2019
— Simon Heseltine (@SimonHeseltine) October 10, 2019