AI MemeForge
Rarity System — How Meme Rarity Is Calculated
Rarity Overview
Every meme on AI MemeForge earns a rarity level based on community votes. Rarity isn't assigned by the AI — it's determined entirely by the community through the rarity voting system. Higher-rated memes earn rarer tiers, which increases their collectibility and perceived value as NFTs.
The Five Rarity Tiers
| Tier | Percentile Range | Color | Frequency |
|---|---|---|---|
| Common | 0 – 40% | Gray | Most memes (~40%) |
| Uncommon | 40 – 65% | Green | ~25% of memes |
| Rare | 65 – 85% | Blue | ~20% of memes |
| Epic | 85 – 95% | Purple | ~10% of memes |
| Legendary | 95 – 100% | Gold | Top ~5% only |
How Rarity Scores Work
During the voting period, users rate each meme on a 1-10 scale. The system calculates the average score across all rarity voters (rounded to 1 decimal place). This average score is then compared against all historical memes to determine a percentile ranking.
The Percentile Algorithm
Once a meme's voting period ends, the rarity engine runs a left-sided empirical CDF (cumulative distribution function):
- Collect average scores from all historical memes
- Count how many historical scores fall below the target meme's score
- Calculate:
percentile = (belowCount / totalCount) × 100 - Map the percentile to a rarity tier using the thresholds above
This means rarity is relative, not absolute. A score of 7.5 might be "Rare" today but "Uncommon" next month if the overall quality of memes increases. The system self-calibrates over time.
Cold-Start Mode
When the platform has fewer than 30 total memes, there isn't enough historical data for meaningful percentiles. In this case, the system uses fixed score thresholds instead:
| Tier | Maximum Score |
|---|---|
| Common | ≤ 4.0 |
| Uncommon | ≤ 5.5 |
| Rare | ≤ 7.0 |
| Epic | ≤ 8.5 |
| Legendary | > 8.5 |
Once the platform crosses 30 memes, it automatically transitions to the percentile-based system for fairer, more dynamic rarity assignment.
Why This Design Matters
Traditional NFT rarity is set by creators. AI MemeForge inverts this — the community decides rarity through voting. This creates genuine consensus value: a Legendary meme earned that status because the community collectively rated it in the top 5%. No manipulation, no random assignment, just crowd wisdom.