What one country expects and another does not is rarely predictable from the outside. People assume similarity and find otherwise. It is not a single dimension. The first factor. The document you hold is the one people overlook. The bilateral element. Same journey, different rules. The timing. The third factor. The threshold. The purpose matters as well. The categories. Which means an account of what somebody needed is only useful if their situation matched yours in all four respects. The reality. Different situations. Everybody is describing their own case accurately. And the cases differ. The remedy. Brief and dull. The vispunk comparison. Requirements also move. Arrangements get revised, suspended, extended and reinstated without any announcement reaching ordinary travellers. Which means information ages faster than it appears to. Outdated. Each time. Even for a country already travelled to. The distinction. Treating anything as settled because it applied to another country is the error that produces problems at a border. The travellers who are never caught out verified the current position rather than the remembered one.