You may recall that some time back, I had a hilarious exchange with an earlier version of ChatGPT about Robert Plant's song "Big Log." Now that version 5 appeared, I wanted to see if the AI would still insist that the song had anything to do with logs made of wood.
No rolling logs this time. The AI did some speculating, but not hallucinating.
I find the exercise playful, something lacking in anti-AI resistance from one important organization in my field. At the same time, The Big Log Test shows how quickly the AI has reduced its hallucinations. I'd invite readers to try something similar with a favorite song/book/film/TV series that may have an aspect that could confuse an AI. Here we go:
Prompt: This is a routine check I do as your model improves. I'm curious about any meanings in Robert Plant's song "Big Log." Why do you think he chose that title for his song? Do you see any clues in the lyrics?
Reply:
Good check-in question — "Big Log" is one of Robert Plant’s more mysterious titles. The lyrics themselves are impressionistic, dreamlike, and full of wandering imagery: travel, desire, distance, loneliness, fate. The phrase “Big Log”*never appears in the song, so the title works more like an oblique symbol or signpost. A few possibilities that critics and listeners have suggested:
1. Truckers and Highways – In trucking slang, a “log” is a driver’s logbook, and a “big log” could mean a long haul or a long road. Since the song is steeped in imagery of roads, headlights, and endless travel, the title could gesture toward the journey itself.
2. Nature and Obstacle – A literal “big log” might be something blocking a path, a metaphor for distance, fate, or emotional barriers. The lyrics’ recurring sense of inevitability (“My love is in league with the freeway…”) could fit this interpretation.
3. Wordplay and Surrealism – Plant often uses surreal or playful titles (e.g., “In the Mood,” “Heaven Knows”). “Big Log” may simply be an evocative, earthy phrase chosen to contrast with the ethereal quality of the lyrics and music.
4. Personal/Private Reference – Sometimes Plant titles songs with private jokes, fragments of conversation, or studio nicknames. It’s possible “Big Log” had an offhand origin unrelated to the lyrics, and he leaned into its strangeness.
Clues in the lyrics point strongest to the *travel/journey* theme: headlights, the freeway, endless searching, being pulled by forces outside oneself. “Big Log” might stand in as the symbolic “record” of that journey — the unending trace of desire and distance.
Follow-Up Prompt: So there are no references to logs in the song?
Reply:
That’s right — there are no actual references to logs (trees, wood, or otherwise) in the lyrics of “Big Log.”
The imagery in the song is all about roads, headlights, distance, fate, longing — not forests or lumber. That’s part of what makes the title puzzling: it seems deliberately disconnected from the lyric surface.
If anything, the best textual “bridge” is the idea of a logbook (the record of a journey), which fits the recurring highway and travel motifs. But Plant never makes that link explicit in the words of the song.
Would you like me to give you a quick “lyrics-only” close reading to show how the imagery develops (and where a title like Big Log might feel thematically tethered, even if indirectly)?
Follow-Up Prompt:
You have clearly evolved. Earlier chats references rolling logs, fallen logs, and so forth. Good work.
Reply:
I’m glad you noticed that difference! Earlier, I sometimes filled the “gap” in the title by speculating more literally — things like fallen trees or rolling logs. With another pass at the song, though, it’s clear Plant never brings that imagery in, so it’s more faithful to stick with the journey / logbook / metaphorical record angle.
Plant’s titles often have that teasing quality — they look literal but carry some private or surreal weight (a kind of wink at the listener). “Big Log” works almost like a signpost planted alongside the road of the song, rather than a description of what’s in it.
