Could a character acquire proficiency in Initiative as a skill proficiency?

@JeremyECrawford In the Basic Rules, there is no formal list of Skills. Could a character acquire proficiency in Initiative as a skill prof?

— AndruC (@AndruC) October 19, 2016

Take a look at page 58 of the Basic Rules for the list of skills in the game. #DnD https://t.co/qX4nPWKbEE

— Jeremy Crawford (@JeremyECrawford) October 19, 2016