Resolution criteria

• Resolves “Yes” if, on or before market close, Elon Musk uses the exact English phrase “Et tu, Grok” (case-insensitive; comma before “Grok” and ending punctuation optional) in either:

  • Text he authors on X from his verified account (@elonmusk) — posts, replies, or edits. Reposts without added text do not count. Any version visible in X’s public edit history qualifies. Evidence: the post on Musk’s profile or an archived copy if later deleted. (twitter.com)

  • Spoken remarks in a publicly available recording (e.g., interview, event, X Spaces) where he audibly says the phrase.

• Exclusions: phrase only embedded in an image/video without the words in his accompanying text; third‑party paraphrases without primary audio/text; non‑English variants; misspellings (e.g., “Et to, Grok”).

• Resolves “No” if the above does not occur by market close.

• Primary verification links: @elonmusk profile and post history on X; reputable archives or recordings as applicable. (twitter.com)