How to Explain Complex Topics to Different Audiences
Explaining a complex topic to someone who doesn't share your background is one of the hardest communication skills to master. Whether you're a researcher presenting to a business team, a developer explaining a system to a product manager, or a doctor describing a condition to a patient — the challenge is the same: how do you keep the meaning while removing the complexity?
The answer is simpler than the problem. You adapt the reading level to your audience.
Know your audience's baseline
Every audience has a baseline of knowledge. A machine learning researcher understands "backpropagation" without explanation. A business executive does not. The first step in explaining anything complex is figuring out what your audience already knows — and stripping everything else.
This sounds obvious, but it's where most explanations fail. We overestimate what others know about our field. The "curse of knowledge" makes us assume that because we understand a concept deeply, others will follow our explanation using the same vocabulary.
Target a 5th-grade reading level
For general audiences, the gold standard is a 5th-grade reading level (Flesch-Kincaid grade 5). This is not about dumbing down — it's about clarity. At grade 5:
Sentences are short (10-15 words)
Vocabulary is everyday English
Structure is direct and linear
Jargon is replaced with analogies
The U.S. government's plain-language guidelines recommend this level for public-facing documents. It's the level at which over 90% of English readers can understand the text without re-reading it. Note: the "5" in "ELI5" comes from "Explain Like I'm 5" — a 5-year-old child, not a 5th-grader. ELI5 AI itself actually outputs a real 5-year-old version (around Flesch-Kincaid grade 1–2) as its simplest level, alongside a 10-year-old (around grade 5), a teenager, and an adult version. The "5th-grade" target writers often quote is the academic equivalent — close to ELI5 AI's 10-year-old rung.
Replace jargon, don't remove it
The most common mistake in simplification is deleting jargon without replacing it. If you remove the technical term but don't add a plain-English equivalent, you create a gap that leaves the audience more confused.
Instead, replace. "Backpropagation" becomes "the method the system uses to learn from its mistakes." "Stochastic gradient descent" becomes "a step-by-step improvement process." The concept stays; the words change.
Use analogies your audience knows
Analogies are the fastest bridge between the known and the unknown. The best analogies use something the audience already understands to explain something they don't.
For a business audience: "A neural network is like a team of junior analysts — each one looks at a small piece of the data, and together they form a conclusion."
For a patient: "Your immune system is like a security team — it checks IDs at the door and removes anything that doesn't belong."
The analogy doesn't need to be perfect. It needs to be close enough to make the next sentence make sense.
Automate the simplification
If you write complex content regularly — research papers, technical documentation, legal briefs — manually simplifying for different audiences is time-consuming.
ELI5 AI automates this process. Paste your text and the tool rewrites it at four comprehension levels — a 5-year-old level (Flesch-Kincaid grade 1–2), a 10-year-old level (around grade 5), a teenager level, and an adult level — replacing jargon with plain English at each rung while preserving the core meaning. It measures each output's readability and re-simplifies if any level is off-target.
This is useful when you need to produce multiple versions of the same content: one for specialists (original), one for a general audience (grade 5), and one for patients or clients (also grade 5, but with different analogies).
Key takeaway
Explaining complex topics is not about removing information — it's about adapting the reading level. Identify your audience, target grade 5 for general audiences, replace jargon with plain English, use analogies, and automate the process with tools like ELI5 AI when you need to produce simplified versions at scale.
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FAQ
What is the best reading level for general audiences? A 5th-grade reading level (Flesch-Kincaid grade 5) is the standard. It's accessible to over 90% of readers and is used by U.S. government plain-language guidelines.
How do I simplify technical text without losing meaning? Replace jargon with plain-English equivalents rather than deleting it. Keep the core facts, shorten sentences, and use analogies. Tools like ELI5 AI automate this process.