<div dir="auto"><div><br><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Sun, May 25, 2025, 8:14 PM G. Branden Robinson <<a href="mailto:g.branden.robinson@gmail.com">g.branden.robinson@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">[CCing groff list as it's also on-topic there, as troff history is to<br>
both lists]<br>
<br>
At 2025-05-25T10:59:13-0700, Adam Thornton wrote:<br>
> I don't think I'd place that kind of faith in the LLM summary without<br>
> having a good read first.<br>
[...]<br>
<br>
At 2025-05-25T16:13:58-0400, Norman Wilson wrote:<br>
[...]<br>
> LLMs are not search engines. They are bullshit generators.<br>
<br>
I had a similarly bad experience with troff history and the AI-generated<br>
"answer" Google situated in prime visual real estate.<br>
<br>
This "AI Overview" claimed:<br>
<br>
"In troff, Brian Kernighan modified the text formatter to include a<br>
sentence space, which adds extra space between sentences. Specifically,<br>
if the sentence space is not set to zero, the second space after a<br>
potential end-of-sentence character (like ".", "?", or "!") will be<br>
treated as a sentence space, adding extra vertical spacing."<br>
<br>
My aggrieved rant, which some of my social media friends endured:<br>
<br>
"Jeeeesus Christ. I needed to look up some advice Kernighan wrote to<br>
troff users decades ago and I got a gout of lies sprayed directly into<br>
my face in an area where I might be able to call myself a domain expert.<br>
<br>
Be VERY VERY careful accepting any AI-generated results, people. This<br>
shit is ALMOST COMPLETELY WRONG. (It's correct about which punctuation<br>
marks [can] end a sentence...but you already knew that part, didn't<br>
you?)<br>
<br>
1. Kernighan didn't innovate this. Ossanna troff (and nroff) already<br>
implemented end-of-sentence inference.<br>
<br>
2. Configuration of inter-sentence spacing is a GNU troff extension,<br>
something else Kernighan had nothing to do with. Ossanna and Kernighan<br>
troffs permitted configuration of the inter-WORD space size with the<br>
`ss` request, but not the inter-SENTENCE space size.<br>
<br>
3. Inter-sentence space is NOT VERTICAL. It's horizontal."<br></blockquote></div></div><div dir="auto"><br></div><div dir="auto">Some things it's quite good on. Other things it's terrible but plausible sounding like this. You never know which you'll get and as a non-expert, you can't know which is which.</div><div dir="auto"><br></div><div dir="auto">Warner</div><div dir="auto"><div class="gmail_quote gmail_quote_container"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
</blockquote></div></div></div>