Even when someone is wrong, they can have a basis for their belief.
Those beliefs are not "baseless," they are simply wrong, and to say a person espousing them is making BASELESS claims, is, simply put, engaging in calumny against the person one is criticizing in that way.
For example, if before the season I had told you that Angel Reese (it's her rookie WNBA season) would get ten consecutive double-doubles this year (she already has, by the way), you would have been free to disagree with me. But even though no WNBA player, let alone any rookie, had ever done that, my claim that she could and would do it could not have been baseless. She had the talent to do it, and in fact she has done it. "Stop making such baseless claims," would have been going too far! It would have not been mere disagreement; it would have been insulting calumny!
Does the media love to engage in calumny against Trump, rather than simply and professionally reporting about him? You be the judge!
No Base! No Base! It's what your teammates might call out to you on a basketball court to get you to pass or take a pull-up jumper if you are driving toward the basket with the ball, and the defense is set up to block your ability to get to the end of the court and turn toward the basket.
The whole arena might have shouted "NO BASE" on this play, but it would have been baseless! :) 1980: Dr.J Baseline Scoop (youtube.com)
So, getting back to the topic at hand, is Trump's claim that he won the election in 2020 baseless, or simply incorrect?
Well, no incumbent who received more votes the second time lost. Trump got more votes the second time, so his losing was a unique aberration in all of American history! If something that extreme happened to you, you're free to feel it's too weird to be believed; why isn't Trump? It is a basis for why one could say the results were not right.
To believe Biden got all the votes he did is to believe that after his basement campaign, he still wound up being 17% more popular with voters than Obama ever was. C'mom, man! I suspect it's something any White racist finds easy to believe, but that few others do. Another basis for why one could say the results were not right.
While there were 66.4 million mail-in/absentee votes in our 2020 Presidential Election, virtually no country allows mail-in balloting because of the common sense conclusion that it's easy for fraudulent or coerced votes to be cast that way. Mail-In Voting Is Banned in All These Countries? | Snopes.com Another basis for why one could say the results were not right.
A search for "Which countries allow unattended drop-box voting?" turns up only the U.S. Another basis for why one could say the results were not right.
Have you seen the mainstream media mention at all how many 2020 votes were in-person and how many by other means? Why wouldn't that be news? It certainly was NEW! That coverup seems like another basis for why one could say the results were not right.
MIT, yes that MIT, did a study of the 2020 election that found, "Interestingly, the dramatic increase in the raw number of absentee ballots cast was accompanied by a significant decrease in the overall absentee rejection rate for the country..." Interesting! And another basis for why one could say the results were not right.
Now, back to the best incorrect "No Base!" of all time:
NBA legends react to Dr. J 's iconic baseline scoop move in the 1980 NBA Finals | ESPN Archives - YouTube