Webster Dictionary 對 fact 和 opinion 做如下解釋。opinion和是否可證實無關。您要是想給這個詞從新定義，那也沒問題。但是您這個新對定義和一般人對這個詞的理解不同。既然和詞典的定義不同，那發文是最好說明。不過按您的“觀點”（opinion）定義，說觀點沒有對錯，也有問題。不能被證實，與是否是事實，是兩回事。比如說哥德巴赫猜想，要麽是正確的，要麽就是錯誤的。可是現在既不能證實，也不能證偽。可是說哥德巴赫猜想沒有對錯，顯然是不對的。問題在於，對錯，和能否證實其對錯，是兩回事。您給出的fact的定義，似乎冠以factual statement（有關事實的陳述）更好。fact（事實）就必須是真實的，這和能被證實或證偽不是一回事。既然想要有共同語言，那最好還是用詞典裏的定義為好，那是大家都接受的。
fact
nounDefinition of fact
1a: something that has actual existencespace exploration is now a fact
b: an actual occurrenceprove the fact of damage
2: a piece of information presented as having objective realityThese are the hard facts of the case.
3: the quality of being actual : ACTUALITYa question of fact hinges on evidence
5archaic : PERFORMANCE, DOING
in fact
: in truthHe looks younger, but in fact, he is 60 years old.
opinion
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1a: a view, judgment, or appraisal formed in the mind about a particular matterWe asked them for their opinions about the new stadium.
2a: belief stronger than impression and less strong than positive knowledgea person of rigid opinions
b: a generally held viewnews programs that shape public opinion
3a: a formal expression of judgment or advice by an expertMy doctor says that I need an operation, but I'm going to get a second opinion.
b: the formal expression (as by a judge, court, or referee) of the legal reasons and principles upon which a legal decision is basedThe article discusses the recent Supreme Court opinion.
