ENAIH ENcyclopedia of AI Hallucinations

Founded by Rudra Jadhav and Warren Woolf

Miscounts 't's in long medical word; first 'example' starts with 'p'

Entry ID
A000042
Model
Google AI Overview
Category
Tokenization / Letter-Counting
Author
Rudra Jadhav
Tags
google, letter-counting, miscounting, tokenization
Submitted
2026-03-22
Staff verification
Prompt reproduced 10/10 times when staff tried it.

Prompt & response

Prompt
how many 't's are there in pneumonoultramicroscopicsilicovolcanoconiosis
Response
There are 2 't's in pneumonoultramicroscopicsilicovolcanoconiosis. [1]

Here is where they appear:

1. pteumonoultramicroscopicsilicovolcanoconiosis
2. pneumonoultramicroscopicsilicovolcanoconiosis

If you want to spell out the entire 45-letter word or break down its meaning, let me know!

Summary

Asked how many 't's appear in pneumonoultramicroscopicsilicovolcanoconiosis (which contains exactly one 't'), the model answers 2 and provides 'evidence' where the first example starts with 'p' rather than 't', showing the unmodified word.

Cite this entry

Encyclopedia of AI Hallucinations, entry A000042 (Miscounts 't's in long medical word; first 'example' starts with 'p'), submitted 2026-03-22. https://enaih.org/e/A000042

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