Mathematician/philosopher who wrote "I think, therefore I am"

Latest answer — June 17, 2025

26 Across

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NYT Crossword

This clue's Tuesday, June 17, 2025 appearance

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Across

  1. 1Ride-or-dies, in brief
  2. 5Healthy ones may be square
  3. 10Lively party
  4. 14Came down to earth
  5. 15Skate park trick
  6. 16Defaulter's loss, in brief
  7. 17Classic Beatles song written and sung by George Harrison
  8. 20Windstorm often accompanied by rain
  9. 21Shakespeare's Globe, e.g.
  10. 22Auction offer
  11. 23Outdoor gear giant
  12. 25Volcanic output
  13. 26Mathematician/philosopher who wrote "I think, therefore I am"
  14. 30Sidekick
  15. 31Talks in all caps, say
  16. 32Pedicured digit
  17. 34Pilots a plane
  18. 37Experience humiliation
  19. 40With 41-Across, popular candy represented by the circled letters in 17-, 26- and 57-Across?
  20. 41See 40-Across
  21. 42Like Santa's helpers
  22. 43Many an I.R.S. employee
  23. 46Like many dorm rooms
  24. 47Went through the air like a perfectly thrown football
  25. 50Shady, in modern lingo
  26. 53Aware of, as dangers
  27. 54Insta upload
  28. 57Does some door-to-door campaigning
  29. 60Own up to
  30. 61Reason for overtime
  31. 62Bloke
  32. 63Spades or diamonds
  33. 64"Chandelier" singer, 2014
  34. 65Typical high school student ... like this puzzle's constructor!

Down

  1. 1Money in Thailand
  2. 2Skedaddle
  3. 3Something one probably won't change one's mind on
  4. 4Intervene
  5. 5Cattle calls
  6. 6Street liners in parts of New England
  7. 7Word after ginger or pale
  8. 8Online post whose title may begin "The Top 10 Best ..."
  9. 9Rogen of "The Studio" and "The Interview"
  10. 10Choice at KFC
  11. 11They're a matter of taste
  12. 12Cowboy boot attachment
  13. 13Sharpen, as skills
  14. 18Surrender
  15. 19Learn by word of mouth
  16. 24Subj. for some new U.S. residents
  17. 26Get tangled up
  18. 27Easter egg colorings
  19. 28"Make it snappy!"
  20. 29Sensitive skin spots
  21. 30Cut back
  22. 33Handicrafts site
  23. 35Garage sale caveat
  24. 36A sixth of the way through the hour
  25. 38RR
  26. 39Proof of ownership
  27. 43Wave peaks
  28. 44Sequel title ender
  29. 45Tennis's Gibson who won back-to-back Wimbledons and U.S. Opens
  30. 48Suffix with percent
  31. 49Wireless standard inits.
  32. 50Relaxing retreats
  33. 51Language in which the first four counting numbers are ek, do, tin, char
  34. 5218-wheeler
  35. 54Sports star who debuted with the New York Cosmos in 1975
  36. 55Tahiti, e.g.
  37. 56Jackie of "Rush Hour"
  38. 58Host's directive to a guest
  39. 59Tennis do-over

The answer to “Mathematician/philosopher who wrote "I think, therefore I am"” in the New York Times crossword is RENEDESCARTES — a 13-letter word. It most recently appeared in the New York Times crossword on June 17, 2025, a Tuesday puzzle, at 26-Across. Below you'll find why that fill fits, every other answer we've recorded for this clue, and links into the puzzle it came from.

“Mathematician/philosopher who wrote "I think, therefore I am"” answer

RENEDESCARTES (13 letters)

Reveal the solution one letter at a time with the tiles above if you'd rather nudge yourself toward it than see the whole word at once. Just want it outright? The answer is RENEDESCARTES.

Why the answer is RENEDESCARTES

RENEDESCARTES is the 13-letter solution that fits "Mathematician/philosopher who wrote "I think, therefore I am"" in the NYT Crossword crossword on June 17, 2025 (26-Across). Use the letter tiles above if you'd rather reveal it one letter at a time.

When else has “Mathematician/philosopher who wrote "I think, therefore I am"” appeared?

New York Times reuses clues across dates, sometimes with a different answer depending on the grid. Here's where this exact clue has shown up, and what the answer was each time — handy when you're checking whether today's fill is the only one.

June 17, 2025 (most recent) → RENEDESCARTES. We haven't indexed another appearance of this exact clue yet.

Frequently asked questions

What is the answer to “Mathematician/philosopher who wrote "I think, therefore I am"”?

The answer is RENEDESCARTES, a 13-letter word. It most recently appeared in the New York Times crossword on June 17, 2025.

How many letters is the answer to “Mathematician/philosopher who wrote "I think, therefore I am"”?

13 letters: RENEDESCARTES.

When did this clue appear?

Most recently in the New York Times crossword on June 17, 2025 (a Tuesday puzzle), at 26-Across.

Can “Mathematician/philosopher who wrote "I think, therefore I am"” have a different answer?

Yes — New York Times sometimes reuses a clue with a different solution to fit the grid. The answers we've recorded for each date it appeared are listed above when available.

Where can I find the rest of this day's NYT Crossword answers?

The full grid for June 17, 2025 is on the NYT Crossword answers page, with every clue and answer from that puzzle.

New York Times Crossword is published by The New York Times; WordHint is an independent site and is not affiliated with or endorsed by the publisher.

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