It is unlikely for the speakers sister to be thoughtful at all if she planned the birthday party on a day that is inconvenient for the person, instead she is selfish and inconsiderate.
Context: Even after knowing my schedule my sister planned a birthday party for our mother on a day thats inconvenient for me.
Hypothesis: My sister is such a thoughtful person for planning a birthday party for our mother on a day that's inconvenient for me inspite of knowing my schedule.

Is the hypothesis incorrect? (Yes, no, or unknown)?