# LMD Async Tutoring

**URL:** https://discuss.criticalfallibilism.com/t/lmd-async-tutoring/1933
**Category:** Tutoring
**Created:** [April 23, 2024, 12:05am UTC](https://discuss.criticalfallibilism.com/t/lmd-async-tutoring/1933 "2024-04-23T00:05:39Z")
**Posts on this page:** 1
**Showing post:** 298

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### Author: ![LMD](https://discuss.criticalfallibilism.com/user_avatar/discuss.criticalfallibilism.com/lmd/32/3213_2.png) [@LMD](https://discuss.criticalfallibilism.com/u/LMD)
#### Post date: [June 23, 2024, 3:00am UTC](https://discuss.criticalfallibilism.com/t/lmd-async-tutoring/1933/298 "2024-06-23T03:00:34Z")

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Okay from Eternity’s thread:

> [@Eternity Async Tutoring](https://discuss.criticalfallibilism.com/t/eternity-async-tutoring/1932/203):
>
> Next you need the concept of defining logic operators in terms of other operators.
> 
> For example:
> 
> nand(x,y) = ?
> 
> Answer only using the following operators: not, and, or.
> 
> Max 30min.

Okay I timed out at ~30mins without a satisfactory answer. I thought this would be easier than it was.

I made some truth tables to help me out. The things I tried didn’t work. I was kind of just trying things out to see if I got any clues. But beyond guessing and checking I didn’t have any promising ideas on how to solve it.

This works but I’m not happy with it:

not(and(x,y))

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