Can I say Q.E.D.?
Does that apply to an explanation with as well as a proof? ChatGPT says I can.
Yes, you can use “Q.E.D.” after an explanation, though it’s more formal and typically associated with mathematical or logical proofs. Q.E.D. is an abbreviation of the Latin phrase “quod erat demonstrandum”, which means “that which was to be demonstrated.” It’s traditionally placed at the end of a proof to signify that the argument or reasoning has been completed as intended.
In non-mathematical contexts, you could use “Q.E.D.” humorously, rhetorically, or for emphasis after an explanation, especially if you feel it resolves a question definitively. For example:
• “Since he arrived before the scheduled time, we can safely conclude he’s punctual. Q.E.D.”
This usage works best if you’re aiming for a touch of formality, intellectual flair, or even a lighthearted nod to its origins. However, in casual conversations, it might come off as overly formal or out of place.