@Steve *******
It is possible , if those persons Accommodation documents, or outbound flights, or the purpose of entry cannot be presented. but unable to show accommodation or preliminary expenses, or if it says it's for business but no details reliable. Naturally, there is a possibility. to lead to believe that there is another hidden purpose And that's why immigration was denied. However, it depends on the case and the surrounding situation. cannot guarantee that There are no people who want to come in to escape something . Therefore, discretion is important.