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Uniform or fair
Card shuffling
A fair shuffle should be able to reach every permutation with the intended probability.
Evaluation card
What “plenty” means here.
- Required property
- Uniform selection plus an unbiased shuffle algorithm such as correctly implemented Fisher–Yates.
- If it fails
- Modulo bias or a flawed swap pattern makes some orders more likely or unreachable.
- Relevant attacker
- Players looking for a predictable deal, or an operator able to influence the generator.
- The Plenty Line
- Use a trusted generator and unbiased integer sampling for every Fisher–Yates step; audit the whole dealing process.
- Why more is not automatically better
- More random bytes do not fix an incorrect shuffle algorithm or a dealer who can replace the result.
Where it appears
Recognize the pattern.
- 01digital card games
- 02tournament seating
- 03physical shuffle verification
The Plentropy rule
Protect the requirement, then stop.
Use a trusted generator and unbiased integer sampling for every Fisher–Yates step; audit the whole dealing process.
Once that claim has comfortable evidence and margin, improve the next limiting factor instead of worshipping a larger entropy number.