它自稱背著的身分
動詞的角度：注意力放在「送來的那一方在宣稱什麼」，而且刻意不保證真假。
verb · C1
To claim to be something, or to claim to do something, when the writer or speaker is not saying that the claim is true, and often thinks it may not be.
聲稱、據稱
核心畫面
Think of a letter, a file or a recording walking up to you with something carried on its back. That load is what it says it is and what it says it means. Purport is about the load, not about whether the load is real. The verb points at the thing carrying it, and the noun points at the load itself.
purport 可以想成：一封信、一份檔案、一段錄音走到你面前，身上背著一包東西。那包東西就是它自稱的身分，以及它要…更多收起
purport 可以想成：一封信、一份檔案、一段錄音走到你面前，身上背著一包東西。那包東西就是它自稱的身分，以及它要傳達的內容。這個字只負責指出那一包，不負責保證裡面是真的。動詞是在說「它背著這個宣稱走過來」；名詞是在說「那一包裡面裝的意思」。兩個用法看的是同一包東西，只是站的角度不同。From the word’s history
Wiktionary traces it through Anglo-Norman purporter and Old French porporter, from pur- (Latin pro, forth) plus porter (to carry, Latin porto): to carry forth.
來源資料把它追到古法文 porporter：pur-（來自拉丁文 pro，向前）加上 porter（帶、運送，來自拉丁文 portō），字面就是「往前帶」。這條線索正好對上今天的核心畫面：一份東西帶著它的內容送到你面前。
Wiktionary entry for purport, etymology_text in this packet: from Anglo-Norman purporter and Old French porporter, from pur- (Latin pro) + porter (Latin porto).
Two branches
那一包裡裝的意思
名詞的角度：把送來的那一包打開，看裡面整體在講什麼，而不是逐字讀。
noun · C2
The general meaning of what someone says or writes: the main point it carries, apart from the details and the exact words.
大意、主旨