In this lecture (15. Petri nets, Basis of The Flow of Tokens), around 5:25, the lecturer uses the word thenfore, I am guessing he is meaning to say therefore but misspeaks. However, he is a native speaker and I'm not, so I just wanted to check if this might be is an old, archaic word form that I just didn't know about.

  • Nothing I've heard, but you could learn as much from googling it as I could. – the-baby-is-you Apr 21 at 8:21
  • No answer but a few thoughts: no dictionary I checked has it; most, possibly all, of the results on Google are scanning errors for 'therefore'; it seems a strange slip-of-the-tongue speaking error for a native speaker to make; maybe it is a jargon word in this particular topic; that the words are actually 'then forgetting' (<not true, but I thought it for a moment); that the OP's question is not really about English language learning. Until you find some other explanation, assume that he mean 'therefore' and made an unexplainable slip-of-the-tongue mistake. – Sydney Apr 21 at 21:54
  • Do you think he might be saying "thenceforth" ("from this time forward")? I listened to the audio but can't tell from the context if "thenceforth" makes sense. I checked the O.E.D. and "thenfore" is not a word. "Thenceforth" is the closest. – SarahT Apr 22 at 0:30

I watched the video. The instructor just misspoke, he meant "therefore" as you guessed. "Thenfore" is not a word.

Etymologically, therefore = there + for, with the archaic meaning of "there" as "that", which also shows in words like thereat, thereunder. So therefore = for that (reason). Assuming a similar etymological development, "thenfore" would mean "for then", which sounds pretty odd.

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