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4 min readThe Reservist

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We've all heard that executives and decision-makers don't have time, sometimes scheduling their days in tightly managed blocks to include bathroom breaks. To be an expert practitioner in AI, you must consider yourself to be the same — your time is valuable, and you need to use it efficiently. You do not need to know everything, just know how to quickly get the right information when you need it, and use that information to make decisions and take action.

Learning by Example: Fixing Certificate Trust Issues

Let's take a common example - connecting to a website and getting a certificate error.

Browser showing a NET::ERR_CERT_AUTHORITY_INVALID error when attempting to load a website
Ah, the infamous cert authority invalid error ❤️

Here's my super accurate statistical distribution on what people do when they see this error.

My job is to get you to realize that you can always be a part of the "fix it" crew, and that this will differentiate you. And that it's never that hard to understand any problem anymore.[^1]

Let's dive in.

🤖AI Prompt
Prompt
Why does this error appear when I try to access certain sites? Answer in 2-3 sentences, at a high level.
This error appears when websites use certificates issued by a Certificate Authority (CA) that isn't included in the default trust stores of commercial browsers or operating systems. Your browser doesn't recognize the CA as a trusted source, so it flags the connection as untrusted — even though the site itself may be legitimate. Installing the appropriate root certificates on your device fixes this permanently.
Model: Claude Opus 4.6Date: February 21, 2026Resources: https://letsencrypt.org/docs/certificate-compatibility/

At this point you could do a few things - branch the conversation into a technical deep-dive on how PKI and certificate trust works, or you could just get the answer and move on. Both are valid, but the key is to be intentional about which one you choose. If you have 5 minutes and just want to fix the problem, skip the deep-dive and go straight to the solution. If you have more time and want to understand the underlying concepts for future problems, take the deep-dive.

🤖AI Prompt
Prompt
How do I fix certificate trust issues? Assume I have no technical background. I have 5 minutes.
First, identify which Certificate Authority issued the certificate. Then visit the official website of that CA and download their root certificate bundle. On Windows: double-click the downloaded certificate file and follow the prompts to install it to your Trusted Root Certification Authorities store. On Mac: double-click the certificate to open Keychain Access, add it to your System keychain, then find the certificate, double-click it, expand Trust, and set 'When using this certificate' to 'Always Trust'. Enter your password when prompted. Restart your browser. Done.
Model: Claude Sonnet 4.6Date: February 23, 2026Resources: https://letsencrypt.org/docs/

Now we have fixed the issue - no more cert authority invalid.

Browser shows the cert is valid
The browser now shows the certificate is valid.

A Note on Security

Installing root CAs into your system trust store is a significant action — it tells your OS to trust any certificate that chains to that root. That's why you should only install certificates from official sources, not from third-party mirrors or links you receive via email.

Closing

The point of this post is not just to fix your cert trust issues (although you should understand and fix them), but rather, take something you know nothing about, and use AI to learn with precision exactly what you need to fix it and move on. This type of decision-making ability is what makes you like a key decision-maker now, with an army of analysts at your disposal (AI). You don't need to know everything, you just need to know how to get the right information when you need it, and use that information to make decisions and take action.

If you found this useful or have questions, join the community or explore the blog for more practical guides.

[^1]: Ok... maybe not any problem. But a lot of them. And the more you practice, the more problems you'll be able to solve with AI.