Ghost unit tests no longer pass, for unknown reason. The last passed in pull req #3632 on 4 March 2020 and fail on #3636 which does nothing but modify the README.

The last time all 11 unit tests ran and passed was https://circleci.com/gh/opencog/opencog/2422 (later pull reqs did not run all tests!?)

There were only two changes: first change is opencog/opencog@852c6

There are a bunch of links to the theory of NARs in the readme that link to a google site that is gone:
All links starting with: https://sites.google.com/site/narswang/

It would be wonderful, if you would update the example in readme.md.

It took me more than an hour to find out, that the start-command has changed somehow. I found this example repo: https://github.com/antirek/ding-dong-sample/blob/master/app.js

Please use that one as example here!

https://github.com/opennars/opennars2/blob/2.0.0_postdev1/src/nal/deriver/truth.clj#L101

(t-and c1 c2)

https://github.com/opennars/opennars2/blob/2.0.0_postdev1/docs/NAL-spec/NAL-3.tex#L206

c &=& or(and(not(f_1), c_1), and(not(f_2), c_2)) + and(f_1, c_1, f_2, c_2)

the preceding paragraph in the NAL spec explains:

When T 1 and T 2 are either highly
similar or opposite to each other, th