Toughts, Truths, Originality, ...
Think a thought. Any thought. Think it quickly.
Was it hard? Was the thought pleasant? Was it interesting, or merely routine? Was it even true?
Was it original? Could someone else be thinking the same thought somewhere else? Could someone else have thought the same thought many hundreds of years ago?
Well, if the thought is true, chances are someone else can also think about it independently.
Thus truth does not belong to any individual. It is out there. It is shared by all. We can only discover it by logical reasoning based on known truths.
Errors, on the other hand, are our own.