The tools on the linked website are very basic which are used on a daily basis:
"Issue trees": Write your problem down
"First principles": 5-whys, which you do e.g. in a post mortem
"Second-order thinking": think of mid- and long-term consequences
"Connection circles": side-effects
You maybe think about mental models of which there are a lot (https://fs.blog/mental-models/) and there are some cargo cults and fancy words around them.
They have their right to exist though, e.g. I really like to end a meeting early because of the law of diminishing returns. :)
"Issue trees": Write your problem down "First principles": 5-whys, which you do e.g. in a post mortem "Second-order thinking": think of mid- and long-term consequences "Connection circles": side-effects
You maybe think about mental models of which there are a lot (https://fs.blog/mental-models/) and there are some cargo cults and fancy words around them.
They have their right to exist though, e.g. I really like to end a meeting early because of the law of diminishing returns. :)