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+<h1>Super Admin</h1>
+
+Super Admin is not a typical role like subscriber, to which capabilities can be granted or revoked; 
+rather, super admin is a status that can be granted to users when WordPress is in multisite mode.
+These users are then granted all capabilities on the network, except where explicitly denied.
+
+A capability such as read_others_posts can be granted to the subscriber role, by the way of:
+<?php
+get_role( 'subscriber' )->add_cap( 'edit_posts' );
+?>
+
+By default, super admins would have the edit_posts capability and any other capability. 
+WordPress uses the current_user_can() function to check if the current user has the passed capability, 
+and this function is what grants all capabilities to super admins. current_user_can is a wrapper function 
+for user_can(), which calls the has_cap() method on the WP_User object. In the has_cap method, 
+there exists the code that grants super admin all capabilities:
+
+<?php
+// Multisite super admin has all caps by definition, Unless specifically denied.
+if ( is_multisite() && is_super_admin( $this->ID ) ) {
+  if ( in_array( 'do_not_allow', $caps, true ) ) {
+   return false;
+  }
+  return true;
+}
+?>
+
+The code above checks if WordPress is in multisite mode and if the user in question is a super admin. 
+If both conditions are met, has_cap returns true if the user is not explicitly denied the capability,
+as in 'do_not_allow'. For users who are not super admins, has_cap continues executing and checks
+if the user has been explicitly granted the capability, ending with:
+
+<?php
+// Must have ALL requested caps.
+foreach ( (array) $caps as $cap ) {
+	if ( empty( $capabilities[ $cap ] ) ) {
+		return false;
+	}
+}
+
+return true;
+?>
+
+As a result, there is no need to explicity grant capablities to super admins,
+because super admins are already granted all capabilities by WordPress.