Whenever a speaker is talking about opinion or emotion, it is the speakers' opinion or emotion unless otherwise specified or contextualized. If I say, "We shoul

Whenever a speaker is talking about opinion or emotion, it is the speakers' opinion or emotion unless otherwise specified or contextualized. If I say, "We should eat pizza," the correct interpretation is that it is my opinion we should eat pizza. If I say, "In my opinion, we should eat pizza," the meaning is the same. Surprise isn't an objective fact. It's a statement of emotion or subjective experience or whatever you'd like to call it. It is often a consequence of an objective difference between an expectation and a result. (An expectation can be subjective, but whether someone holds that expectation is either true or false.) But surprise isn't that objective difference, it's the subjective response. So if I say, "Surprisingly, the sun rose today," absent other context it means I find it surprising that the sun rose today. It doesn't mean, "Everyone should find it surprising that the sun rose today." For that, I would need to add more context or you would need to bring in some assumptions that aren't supported by my statement. So, this is equivalent to "To my surprise, the sun rose today."