title: Laravel sometimes vs sometimes|required
body: <p>What is the difference between <code>sometimes|required|email</code> and <code>sometimes|email</code> in Laravel validation?I've read <a href="https://laracasts.com/discuss/channels/general-discussion/what-does-sometimes-validation-rule-truly-mean-confused" rel="noreferrer">this discussion from laracasts</a> but still it is ambiguous for me</p>