# r/cissp

**Post day/time:** Wed May 13, 2026 — 11:00 AM ET
**Flair:** Check sub rules — usually "Resource" or "Discussion"

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## Title

> CISSP adaptive prep with pass-probability prediction — solo founder asking for honest feedback

## Body

I'm Charles. Founder of AccelaStudy AI. Web app launched Tuesday. r/cissp specifically because the CISSP audience is the most demanding I know — you've all read the OIG cover-to-cover, you can smell content that's been generated lazily, and you have strong opinions about what works.

Honesty up-front: solo founder, built the platform in 81 days with Anthropic's Claude as my only collaborator. 74 repos, 1.27 million lines of code, $0 raised. I'm not selling to your wallets, I'm asking for your judgment.

Three things specifically about CISSP prep that I'd love your perspective on:

**1. Pass-probability prediction.** This is the feature I'm most worried about getting wrong for CISSP specifically. probabilistic simulation of 2,000 exam attempts using confidence bands on your demonstrated proficiency. The risk is that CISSP is heavily scenario-based — "what would a CISO do?" — and the engine might over-confidently predict you're ready when you're really just good at the recall/recognition layer. I'd love to know: is there a way you'd want this calibrated? Should we down-weight predictions when your domain coverage is uneven?

**2. Domain weighting.** CISSP's eight domains have specific exam weightings (15% Security & Risk, 10% Asset Security, 13% Security Architecture, etc.). Our engine respects these weightings when generating practice exams. But the deeper question is whether your practice study time should match the exam weights, or whether it should be inverted (more time on your weak domains regardless of weight). We default to weighted-by-mastery-gap, not weighted-by-exam. Curious what the experienced folks here think.

**3. The "think like a manager" framing.** This is the soft-skills layer that traditional question banks fail at. We have explanation-style activities where you justify your answer in 2-3 sentences and the engine evaluates the reasoning, not just the choice. Doesn't yet pass adversarial cases — would value gut-checks from people who've passed CISSP on whether this approximates the real "think like a manager" muscle.

What's also in the platform if you care about scope: the AVIAN engine maintains a real-time knowledge-model model of your knowledge updated in <2 ms per answer; root-cause gap detection traces wrong answers to the missing prerequisite (helpful for the cross-domain scenario questions); cross-cert credit if you also hold Security+ / CySA+; 2196 hands-on labs platform-wide.

Free demo at link in comments. $39/mo once you sign up. Cheaper than the OIG.

I'll be in this thread answering for 8+ hours.

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## First comment (drops the link)

> Free demo (no signup): accelastudy.ai
>
> Pick CISSP from the dropdown if you want to see the engine on the toughest domain we cover.

## Engagement strategy

- This audience is full of people who failed CISSP once. Be ready for "no tool is going to help me pass" cynicism. Don't push back; agree with the part that's true (no tool replaces the work) and offer the demo, no signup.
- If asked about content validation: yes, every question runs through our multi-stage validation pipeline; no, it's not a substitute for human review on the most ambiguous "all of the above" CISSP-style ones; we flag those for manual review.
- Free month codes for r/cissp folks. The cohort that helps you here is small but high-trust.
