How to Speak
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Core Premise:
- Success in life is heavily determined by your ability to speak, your ability to write, and the quality of your ideas, in that exact order [00:00:35].
- Speaking quality follows a formula: \(Knowledge \times Practice \times Talent\), where inherent talent (\(Talent\)) is the smallest factor; maximizing your knowledge of communication techniques can compensate for lack of natural talent [00:01:02].
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Rules of Engagement:
- Laptops and cell phones should be closed during a talk [00:03:16]. Humans possess only one language processor; if an audience member is reading or browsing, they cannot listen, and they distract those around them as well as the speaker [00:03:34].
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How to Start:
- Avoid starting with a joke because the audience is still adjusting to your vocal parameters and setting things away [00:04:38].
- Start instead with an "empowerment promise"—explicitly telling the audience what they will know or achieve at the end of the presentation that they did not know at the beginning [00:05:05].
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Key Structural Heuristics:
- Cycling: Go around your subject multiple times [00:05:55]. Since roughly 20% of the audience is "fogged out" at any given moment, repeating key concepts three times ensures the overall probability of absorption is high [00:06:19].
- Building a Fence: Define your ideas clearly by contrasting them against what they are not, preventing the audience from confusing your work with existing concepts or algorithms [00:06:43].
- Verbal Punctuation: Provide landmark enumerations or outline checkpoints throughout the talk to help distracted listeners re-engage ("get back on the bus") [00:07:43].
- Asking Questions: Engage the audience by pausing up to 7 seconds for an answer [00:09:05]. The question must be chosen carefully: not too obvious (which embarrasses people) and not too difficult (which results in silence) [00:09:21].
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Time and Place Selection:
- Time: 11:00 AM is optimal because audiences are fully awake, alert, and not fatigued or sluggish from a recent meal [00:10:26].
- Lighting: Keep the room fully lit [00:10:59]. Dim lighting signals the human brain to sleep; it is impossible to see slides through closed eyelids [00:11:16].
- Preparation: "Case" the room beforehand to eliminate unexpected technical or spatial surprises [00:11:57].
- Density: Ensure the room is reasonably populated (at least half full) so the space feels active and interesting [00:12:55].
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Tools of the Trade:
- Blackboards/Whiteboards: Ideal for informing and teaching [00:13:45]. Writing has a natural graphic quality and dictates a speed that matches the human capacity for absorbing ideas [00:14:01]. It also provides a physical target for your hands, preventing awkward postures like putting hands in pockets or behind the back [00:14:52].
- Props: Highly memorable and utilize "empathetic mirroring"—activating mirror neurons in the audience so they mentally feel the physical movement, which flat images or slides cannot reproduce [00:16:53, 00:22:57].
- Slides: Best used for exposing ideas rather than teaching them (e.g., job talks or conferences) [00:23:51].
- Keep slides minimal: remove background junk, eliminate corporate logos, and strip out unnecessary words so the audience listens to you instead of reading [00:26:37].
- Use large fonts (minimum 40–50pt) to naturally restrict the word count [00:28:56].
- Avoid laser pointers because they force you to turn your back and lose eye contact [00:31:20]; use explicit static visual cues like arrows drawn directly onto the slide instead [00:31:37].
- Avoid text-heavy slide decks; aim for a layout that incorporates plenty of whitespace, imagery, and breathing room [00:32:01].
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Special Cases for Presentations:
- Inspiring an Audience: Inspiration requires exhibiting genuine passion for your topic and helping the audience view a familiar problem in a completely new way [00:37:36, 00:37:47].
- Teaching How to Think: Humans are storytelling animals [00:40:40]. Teaching how to think requires providing students with core stories, specific frameworks for analyzing those stories, and mechanisms to evaluate their reliability [00:41:13].
- Job Talks & Persuasion: You have exactly 5 minutes to establish your vision (the problem you care about and your novel approach) and prove that you have actually done something (by enumerating the concrete implementation steps required) [00:45:14, 00:45:53].
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How to Stop:
- The Final Slide: Never end with a slide listing all your collaborators (put them on the first slide) [00:54:17], nor with generic "Questions?", "Thank You", or "The End" text, which squanders valuable visual real estate [00:54:29, 00:54:55]. Your final slide should outline your permanent Contributions, remaining visible while people ask questions [00:55:45].
- Final Words: Closing with a well-timed joke can be effective [00:56:54]. Never explicitly say "Thank you" or "Thank you for listening" as a final statement, as it weakens your authority and implies you are thanking the audience for enduring a boring talk out of politeness [00:57:49]. Close with an implicit convention or a genuine salute to the audience and the venue [01:01:40, 01:02:04].