The big idea
💬
You did not communicate until they understood
The only test is what the other person grasped — not whether you said the right thing.
Communication & Argumentation · Lesson 1
What Makes Communication Effective?
beginner⏱ 16 min · 7 cards
Try it
Decode It
“"The p99 latency regression is blocking the release; traced to lock contention in the write path."”
A message to a non-technical manager. Which versions actually communicate?
Clarity is not simplicity. It is the right level of detail for this receiver.
Judge messages by what the receiver will actually understand.
Where it breaks
Three failure points
Tap each.
Key term
Why experts explain worst
What sabotages the person who knows most?
tap to reveal ↻
The curse of knowledge
Once you know something, you cannot imagine not knowing it — so you skip the steps that are obvious to you and invisible at the listener’s gaps.
Nuance
Tenerife, 1977
Maester Note
"We are now at takeoff" meant two different things to pilot and tower. The sender’s intent was irrelevant — only the shared understanding mattered, and confirming it is cheap.
Quick check
What is the correct measure of whether you communicated well?
You did it
Nice work
Mark this lesson complete to track your progress.