What does QED mean in INTERNET

Meaning

QED is an abbreviated form of the Latin phrase quod erat demonstrandum, which literally translates to “that which was to be demonstrated”. It is most commonly used when someone wants to conclude something that has already been proven or shown in some way. The term is often used in philosophical dialogues and scientific contexts such as when making a mathematical proof. QED can also be seen as a way of signifying a final statement, particularly at the end of an argument or discussion.

Usage

When someone uses QED as part of an argument or discussion, it signifies that they are making a conclusion based on everything they have said beforehand. As such, it’s important for the speaker or writer to ensure that their earlier points are valid so as not to weaken their own argument with an erroneous conclusion. QED can also be used simply as a way of signifying the end of one's thoughts on a particular topic; for example, one could say “and now I’ll bring this discussion to a close with the words ‘QED’” before moving onto another issue.

Examples

Here are some examples of how QED can be applied: • In mathematics, after presenting a proof for something such as the Pythagorean theorem one could write "QED" at the end to indicate that they have concluded their proof and fully demonstrated it beyond doubt. • During debates about politics or philosophy, one might use QED after making their point; if they feel confident enough about their opinions then declaring them with "QED" gives them more assurance than simply saying them without any special emphasis. • If someone wants to show off their knowledge of Latin then using 'QED' elsewhere other than academia would give them an opportunity do so without sounding pompous.