Doubt regarding the dawn and sunset, and the principle of excusing error

Question:
He says: Honorable Shaykh, may Allah grant you success. My question is about doubt concerning the appearance of the dawn, and likewise doubt concerning the setting of the sun. Can these be placed under the principle of excusing error, since they occur due to an error in estimating the time, especially if there is no negligence?

Answer:
No, my brother. This is based on the principle of remaining on the original state, on the principle of remaining on the original state. If a person eats while in doubt about the appearance of the dawn and it does not become clear to him that it has appeared, his fast is valid, because the original state is the continuation of the night, and it has not become clear that this is not the case. However, if he eats while in doubt about the setting of the sun, his fast is not valid, because the original state is the continuation of the day. Yes.