Video summary
Cliff Stoll opens his appearance at DEF CON by playfully addressing the nature of public speaking and audience engagement, suggesting that successful talks should avoid over-reliance on PowerPoint slides in favor of storytelling. He argues that audiences crave human connection and personal anecdotes rather than dry data sets or formal descriptions, noting that people want to meet the speaker behind the presentation. Stoll humorously illustrates this point by describing how he leans on his colleagues during interviews, turning a technical talk into an opportunity for genuine interaction. This approach emphasizes authenticity over polished visuals, encouraging speakers to be familiar with their material so they can focus on engaging directly with listeners rather than reading from slides or worrying about timing.
The conversation then shifts to Stoll's academic background and the contrasting reception of his PhD dissertation versus his famous book, *The Cuckoo's Egg*. Although he spent five years writing a detailed scientific study on molecular scattering in Jupiter's atmosphere—a topic that impresses specialists with its technical depth—only a handful of people ever read it. In contrast, his memoir-style book about hacking experiences became widely popular because it tells an accessible story rather than presenting pure science. Stoll jokes that while academics might admire the complexity of his dissertation, general audiences prefer narrative-driven content and will buy books to support authors financially, even if they only skim them once due to what he calls "read errors" caused by rereading pages too many times.
Stoll continues with a series of humorous observations about language degradation in printed materials, claiming that libraries are full of corrupted texts where letters fall out, adverbs turn into adjectives, and punctuation marks disappear entirely over time. He extends this absurd logic to suggest that library books should never be read because they accumulate so many errors from previous readers, urging everyone instead to purchase new copies of his book for optimal quality. His wit escalates further when he describes a person wearing a Klein bottle around their neck as someone who is non-orientable and imported directly from the fourth dimension, blending physics concepts with surreal humor that delights both himself and his interviewer.
Throughout the interview, Stoll maintains an irreverent tone filled with self-deprecating jokes about insomnia, bit errors in memory, and even suggesting that fog horns are made of fog itself rather than metal. He reflects on growing up in a laboratory environment where biological experiments were conducted casually enough to include removing his mother after nine months—a joke that highlights the absurdity he finds in scientific rigor versus everyday life. Ultimately, Stoll's message is one of embracing imperfection and prioritizing human stories over rigid structures, whether in writing books or giving talks at conferences like DEF CON. His final words leave room for playful detachment as he invites his interviewer to join him physically before concluding with laughter about the impossibility of separating themselves completely.
Read the full video transcript
So, people think that I actually did a
talk. It wasn't me. It was my alter ego.
It was um people think that I know what
I'm talking about, but I don't. Um the
main the main way you do a talk,
the way you do a talk is
you assume that everyone in the audience
has a tomato.
And so your job is to move as quick as
you can so that so that they usually
miss and when they think that they're
about to get you, you make sure that
they don't. So So the other rule about
doing talks, this is still
is it videoing?
Is it audioing?
>> The main thing, the main thing for
speaking at Defcon or anywhere else is
to realize
the more PowerPoint you use, the worse
off you are.
>> You want to do a talk, you ought to be
able to do it sort of without thinking
about it. You're familiar with what you
want to say. Why do you need PowerPoint?
Moreover,
often times, not always, at Defcon,
there's too many, oh, I got to give you
more facts and not enough, oh, let me
tell you about this story that happened.
And there's a certain amount of
there's a certain amount of I must
formally describe all of this to you and
make sure you understand the entire data
set when what people want to hear is
who's over there and and they want to
know like how can you possibly be doing
this? I mean people want to meet the
person talking rather than just seeing
their PowerPoint.
>> No.
>> Agreed.
>> Absolutely.
>> So if you have a talk to give,
lean on the people around you who
somehow or another will support you. No.
>> Y absolutely.
>> As everybody else sort of ducks out of
the background. [laughter]
>> I wanted to get a picture of you leaning
on Joe.
There it is.
>> This is my better side to lean
[laughter] on.
>> Uh, so what did what were you wanted to
do? An interview.
[laughter]
>> What would you like to do?
>> Oh, I'd like to interview myself.
>> Okay. Please do.
>> Okay.
Um [snorts]
um um um
>> so Cliff, I was wondering when you wrote
your dissertation on the scattering
function of molecules in the upper
atmosphere of Jupiter, how come the
number of people who read your PhD
dissertation would fit into a bus
shelter and that took you five years to
write? But here there's a book called
The Cuckoo's Egg
that summarized one year of your life
and it took you 9 months to write and
yet everyone at Defcon wants to read
your book and nobody wants to read your
dissertation on Jupiter. [laughter]
Um, Cliff, that I I have to answer the
question, of course, right Cliff, that's
a really good question. I've wondered
about the same question myself. I think
it's because well the pure science of
the physics of Jupiter's atmosphere is
so
Were you throwing a tomato [laughter]
>> at you? Right. It's so wonderful that
people just stand in awe of that
dissertation and as soon as they hear
the phrase photoolarimemetry of non-gay
atmospheres around the Jovian upper
atmosphere, they just freeze solid and
they say, "Oh, what a terrific
dissertation." But when they see this
book called The Cuckoo's Egg, they say,
"Oh, geez, cheesy book. Uh, I'd better
buy it to help out this guy's family."
You know, anybody who'd do this, he
needs more support than he can get by,
uh, putting his hand out for donations.
Uh, is that reasonable?
>> Fair enough. [laughter]
So that's that's the reason why um
that's the reason why ain't nobody ever
read my dissertation except for my
adviser and three others on the
committee. [laughter]
>> I'll read your dissertation.
>> Yeah. Right. Right. It'll put Yeah. Next
time you've got insomnia. [laughter]
>> Yeah. So story,
>> right? Exactly. So that's that's pretty
much concludes my dissert my interview
of myself. Um
uh what other things were there? Um
>> what would you tell a kid just learning
about Defcon? Never
>> Oh, a kid learning about Defcon.
>> Ah, save yourself the $580
[laughter]
of the cost to come there and instead go
out and buy a dozen copies of Cuckoo's
Egg. [laughter]
Um, you'll not only help yourself
because you'll be able to read it,
>> each book should only be read once. You
know that?
>> That's what I heard. Okay.
>> Because the more you read a book,
>> right,
>> there's read errors, right?
>> And they're caused by rereading the same
pages.
>> Sure. Sure.
>> You know, notice an expert on the
subject.
>> If you read the same page over and over
again, eventually these bit errors
happen,
>> right? And and so it's important that
you every the next time you want to read
a book, buy another new one.
>> And of course,
>> uh listen to this [laughter] expert.
Listen to an expert on the subject.
>> True. True story.
>> Yep. And
>> wait a second. I have to get the um So
tell me um person who knows all about
bit errors and things like this.
Wouldn't you agree that a library book
is the one book that you should never
ever read because it has lots of other
people who have read it? So all these
read errors and parody errors show up in
it. Say yes.
>> Yes. Enter.
>> Yes. Absolutely.
>> Notice notice how that means that if you
want quality writing only purchase new
unread copies of Cuckoo's Egg.
>> That one had some errors. You flipped
through it.
>> Oh, I flipped through it. What? Oh,
yeah. What you want to do, what you
>> Take it off your hands.
>> Yeah. What [laughter] you want to do is
when you get a good book, you know, get
a get a book in your hand. Um, uh, page
through it upright like this, never
upside down. You'll find letters falling
out on the ground. [laughter]
And that's where adverbs will turn into
adjectives. And there are these things
called Oxford commas that you find all
over the floor, you know. dashes.
>> Oh, M dashes. M dashes get shortened to
regular dashes and they get clunkked
into semicolons and the semicolons turn
into periods and the periods they
disappear entirely. [laughter] So you
got run-on sentences. Yep. That happen
you take it from an experienced
knowledge
>> all the time. All the time.
>> All well most of the almost all the
time.
>> Yeah.
>> All the time except when it doesn't
happen.
>> 80% of the time. Every time.
>> Yeah. 80% of the time. So yeah, it's
>> the corridors.
>> Where is it?
>> Oh, notice somebody with taste and
dignity.
>> Who go walks around with a Klein bottle
around the neck,
right? How often do you find somebody
with such eloquent
sense of of self? How often do you find
somebody who is so one-sided, someone
who is so non-orientable,
someone who is directly imported from
the fourth dimension? I don't think ever
anywhere I I [laughter] I I'm blown away
by this.
>> I appreciate that, Clint.
>> Well, I appreciate it even more.
>> Do you know how much volume a Klein
bottle has?
>> I not only know how much a volume a
Klein bottle doesn't have, I also know
much how much it does have. [laughter]
Oh
>> yeah,
>> tell me about it.
>> They're equal.
>> Uh-huh.
>> Um, so
if
>> if tin whistles are made of tin, what do
they make fog horns out of?
>> Fog.
>> Oh,
where do you find goons from? [laughter]
We'll
>> ask ourselves this.
>> Yeah, it was created in a lab. Cliff,
>> in the lab.
>> In a lab.
from Mexico.
>> I didn't think of it that way, but I
guess you're right. It's a was a curious
biological lab, and after being in it
for 9 months, I went to have my mom
removed. But I hadn't thought of it
quite that way as a laboratory
experiment. But I guess my parents
probably thought of it that way, you
know.
>> Do you think I I
[laughter] you know,
I I like that point of view. Yeah.
He's so fun. [laughter]
>> He's such a blast.
>> He is phenomenal. Yeah,
>> I was I was I I
>> I grew up in a lab.
>> Oh, sorry. Uh, is that good enough?
>> That's wonderful.
>> That has nothing.
>> Okay. Can I detach?
>> You can detach.
>> Oh, come here. Come here. [laughter]
Come here.
It's stuck.