# The Harmonic Triads

**URL:** https://www.ilovephilosophy.com/t/the-harmonic-triads/48486
**Category:** Philosophy
**Created:** [February 2, 2022, 10:13pm UTC](https://www.ilovephilosophy.com/t/the-harmonic-triads/48486 "2022-02-02T22:13:05Z")
**Posts on this page:** 1
**Showing post:** 669

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### Author: ![Ichthus77](https://www.ilovephilosophy.com/user_avatar/www.ilovephilosophy.com/ichthus77/32/446_2.png) [@Ichthus77](https://www.ilovephilosophy.com/u/Ichthus77)
#### Post date: [May 10, 2026, 9:33pm UTC](https://www.ilovephilosophy.com/t/the-harmonic-triads/48486/669 "2026-05-10T21:33:02Z")

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Updated: [The Thingy - Google Sheets](https://docs.google.com/spreadsheets/d/11ic7IN61_ccUS3Nx2_k_eYzVU4nKqTpqaVCS94lJ-5M/edit?usp=drivesdk)

New stuff, but some updates in the old stuff at the link^

 ![IMG3340](https://www.ilovephilosophy.com/uploads/default/original/3X/a/b/abe8b1c31aaaaec4cacf4576f0c1e35a7ca360fa.jpeg)  
5/17/26:  
edit the last two rows that got the last two columns flipped: [Triadic First Principle(s) - #46 by Ichthus77](https://www.ilovephilosophy.com/t/triadic-first-principle-s/85402/46)

Some stuff not yet included (leave it to the math nerds).

Many gleaned from this thread:

> [@Complete the triad](https://www.ilovephilosophy.com/t/complete-the-triad/85374):
>
> What’s the third thing (fill in the blank) besides 1) deductive necessity of validity (truth) and 2) inductive sufficiency/actuality of soundness (justification/demonstration)? Answer: 3) abductive \_\_\_\_\_\_\_\_\_/possibility of conclusion/explanation (first principle/final cause)? In other words, complete the triad: validity △ soundness △ \_\_\_\_\_\_\_\_ [Clue.](https://copilot.microsoft.com/shares/Xw6nGby4bgqEXXsTwXTji)[Spoiler Alert ;^)](https://copilot.microsoft.com/shares/J29H6fGiQticGJnEka4Q4)

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