I feel like this is a dumb question because I've always thought this to be true and never had anything or anyone disagree with this idea, but recently I've come across two instances where someone has said something along the lines of "I think X is objectively Y" and vehemently defended their usage of "think". Isn't this contradictory? If you say "I think blue is the best color" doesn't that imply it is your personal opinion that blue is the best color and nothing more? It was my understanding if you wanted to convey objectivity you can't use "I think" and instead would use "is". "Blue is the best color".
If I were to replace "I think" with "it is my opinion" and "is objective" to "is not a personal opinion" then this should be correct:
"I think X is objectively Y" -> "It is my opinion of X that Y is objective" -> "It is my opinion of X that Y is not a personal opinion" which is a contradiction.
Maybe I messed up somewhere but it seems like that is correct. It might be unnecessary to go that in depth but I can't figure out any other way to prove whether it's correct or incorrect to pair "I think" with "objective". I would appreciate if someone could help me out with this. Thanks!