The following afternoon found the Senior Common Room unusually peaceful.
Mr Blottisham was examining a dictionary with an expression suggesting he had finally located the source of all knowledge.
Professor Quillibrace noticed.
"I trust the dictionary is behaving itself, Mr Blottisham."
"It is extraordinarily reassuring."
"In what respect?"
"Everything is alphabetised."
Miss Stray smiled.
"There is a certain comfort in believing the universe proceeds from A to Z."
Blottisham tapped the hefty volume.
"I've been thinking about yesterday."
"A dangerous habit," murmured Quillibrace.
"We decided there were two kinds of significance."
"We did."
"Meaning and mattering."
"Semantic and existential significance."
"Exactly."
Blottisham looked pleased.
"So I thought I'd investigate where meanings actually live."
"And?"
"They appear to live in dictionaries."
Quillibrace removed his spectacles.
"I see."
After a thoughtful pause he asked,
"What does the word mother mean?"
Blottisham opened the dictionary.
"It says..."
Quillibrace held up a hand.
"No reading."
"Oh."
"What must exist before the definition makes sense?"
Blottisham frowned.
"A mother?"
"Try again."
Miss Stray leaned forward.
"A child."
"Precisely."
Quillibrace nodded.
"And what else?"
"A father?"
"Possibly."
"A family?"
"Better."
"A society?"
"Better still."
Blottisham slowly closed the dictionary.
"So the definition depends upon other things."
"Almost entirely."
Miss Stray reached for her cup.
"One word quietly summons an entire world."
Blottisham considered this.
"So words don't really live by themselves."
"They never did," said Quillibrace.
"But surely," said Blottisham, "every word has its own meaning."
Quillibrace smiled.
"Suppose English possessed no distinction between yesterday and tomorrow."
Blottisham blinked.
"That would be inconvenient."
"Would it?"
"I'd miss trains."
"You might."
"But more importantly," said Miss Stray, "time itself would be organised differently."
Blottisham looked puzzled.
"How can language organise time?"
"It does not alter time."
"No."
"It alters the distinctions available for thinking about it."
Quillibrace rose and walked towards the bookcase.
"Halliday proposed something rather remarkable."
"He liked grammar."
"He understood grammar."
"Same thing, surely."
"Not quite."
Quillibrace selected a volume.
"He argued that language does not merely label experience."
"It doesn't?"
"It construes experience."
Blottisham frowned.
"I've always thought language described things."
"So have most people."
"And it doesn't?"
"It certainly describes."
"But before description?"
Miss Stray answered.
"It organises."
The room became quiet.
Blottisham eventually spoke.
"So before language..."
"...experience is less finely differentiated."
"You mean children?"
"Exactly."
Miss Stray continued.
"A small child feels uncomfortable."
"Yes."
"Later the child learns to distinguish hunger."
"Mmm."
"Fatigue."
"Yes."
"Embarrassment."
"I remember that."
"Regret."
"I remember that rather more."
Blottisham sat back.
"So language isn't simply attaching labels."
"No."
"It is providing new ways of understanding."
Quillibrace nodded approvingly.
"And notice something else."
"What?"
"The richer the system becomes..."
"...the more possibilities become available."
Blottisham brightened.
"Ah!"
Quillibrace waited.
"So language is really a collection of possibilities."
Miss Stray looked delighted.
"I think Halliday would have approved of that."
Blottisham became thoughtful.
"I've always imagined language as a bag of words."
"A common picture."
"But perhaps..."
He hesitated.
"...perhaps it's really a network of choices."
Quillibrace smiled.
"Very nearly Halliday's own formulation."
There followed a silence.
Then Blottisham asked,
"Professor?"
"Yes?"
"Where does meaning actually live?"
Quillibrace looked pleased by the question.
"An excellent difficulty."
He glanced towards Miss Stray.
She answered first.
"Not inside individual words."
"No."
"Not inside dictionaries."
"No."
"Perhaps..."
She paused.
"...between possibilities."
Blottisham looked puzzled.
"Between them?"
Quillibrace nodded.
"If every sentence meant exactly the same thing..."
"It wouldn't mean anything."
"If every tense were identical..."
"There'd be no time."
"If every statement carried identical certainty..."
"There'd be no difference between guessing and knowing."
Blottisham's eyes widened.
"So meaning comes from differences."
"Yes."
"Not merely from words."
"Precisely."
Miss Stray stirred her tea thoughtfully.
"Perhaps civilisation itself is built that way."
"In what sense?"
"We inherit distinctions."
"What sort?"
"Justice and revenge."
"Truth and certainty."
"Freedom and licence."
"Responsibility and blame."
She smiled.
"Each distinction enlarges the possibilities available for thought."
Blottisham looked around the room.
"So universities don't merely teach facts."
"No."
"They teach distinctions."
Quillibrace laughed quietly.
"A sentence that should perhaps be engraved above every university entrance."
Blottisham was silent for several moments.
Finally he asked,
"What has all this to do with artificial intelligence?"
Quillibrace looked towards the rain-streaked windows.
"A great deal."
"The machine inherits language."
"Yes."
"So it inherits these distinctions."
"Indeed."
"It inherits the possibilities."
"It does."
Blottisham nodded slowly.
"So perhaps..."
He searched for the words.
"...perhaps a language model doesn't primarily inhabit the physical world."
"No?"
"It inhabits this enormous landscape of distinctions."
Miss Stray looked up.
"A world composed almost entirely of semantic significance."
The three of them sat quietly with that thought.
Outside, the rain continued patiently reorganising the garden.
Inside, another possibility had quietly taken shape.
Perhaps words were never the true units of language.
Perhaps the real architecture lay in the spaces between them—in the endless network of choices, contrasts and possibilities through which human beings had gradually learned to make the world increasingly meaningful.
Blottisham closed the dictionary.
"I think," he said, "I've been looking in entirely the wrong place."
Quillibrace smiled.
"My dear Mr Blottisham..."
"...that is how most discoveries begin."