Hello, Garrette.
Yes, I think a civil tone is more effective because it clarifies arguments. But sometimes people on the internet think bullying is a more effective way because it can browbeat people into submission. I got browbeated very successfully before online when I was defending Palestinian rights with a very intense "pro-Israeli", so I know that the tactic can work, unfortunately.
Turning to the 3 days and 3 nights issue, I think that the mid-day darkness is the best answer for those like you who prefer to read the "days and nights" phrase in an exact, literal, individual sense.
For me, if the sun's shine is blocked from the earth and "darkness covers the land", then this is effectively night for purposes of prophecy. To give an example, when Jesus said that he would be in the heart of the earth, did he mean that the earth had an actual heart organ pumping a liquid that he would be in? By this he must have meant "the heart of the earth" in a prophetic or poetic sense, which could the earth's magma zone or Hades, commonly depicted as a fiery place in the earth.
And since we are dealing with prophecy we don't have to expect a literal fulfillment. For example, if a person dreams of flying on a white bird, then perhaps the dream is "fulfilled" if he/she tries parasailing. The Old Testament gives examples of other dreams in which literal fulfillment of the dreams is unnecessary. So since we are dealing with prophecy, the idea of three "nights" can also be flexible. In an exact literal sense a "night" can be a hiding of the earth from the sun through rotation. But in a prophetic, symbolic sense, the earth could be hid from the sun through an eclipse or some other intervening event as described in the gospel in order for the prophecy of a "night" to be fulfilled.
Perhaps you will not agree with my answer, but I don't know how to explain the prophetic meaning of nights, heart of the earth, etc. without reformulating or expanding on the allegorical meanings of the term and how prophecy works.
Regards.