Then please explain in great detail - in a thesis worthy of a Ph.D - how Twilight Sparkle is worst pony. No subjective opinions, or the answer 'No' allowed, or be proved wrong, and you'll have admitted that Twi IS Best Pony.
...but then, the simple fact that Twi is an Alicorn God, next to Cadence, Luna & Celestia, is sufficient to completely destroy your & anyone else's argument (or even personal 'opinion'), so no Ph.D-worthy thesis or answer.
...and being reduced to /b/-like behavior in your answer is invalidated, and you prove that Twi IS Best Pony by default.
...and besides, when even Rainbow Dash agrees - that Twi is not just Best Pony, but wants Dat Ass - don't bother her about it, then don't bother with said detailed explanation, and simply agree that Twi IS Best Pony.
...and even your subjective 'opinions' are invalid.