One partner has a birth certificate; the other only remembers an approximate morning hour. Record the source of each birth time and compare adjacent possible charts before reading compatibility. Keep uncertain palace claims provisional and ask permission before using the other person's data.
Read two possible charts for the partner with an uncertain birth hour. Label every palace claim by the input on which it depends. A chart that looks more appealing is not evidence of the correct hour. Use actual relationship conversations and consent to check the practical question.
Read two possible charts for the uncertain birth hour. Keep claims that change between them provisional, and check the relationship question through both partners' accounts.