# Ann: SWI-Prolog 8.1.21

**URL:** https://swi-prolog.discourse.group/t/ann-swi-prolog-8-1-21/1778
**Category:** Releases
**Created:** [January 23, 2020, 3:15pm UTC](https://swi-prolog.discourse.group/t/ann-swi-prolog-8-1-21/1778 "2020-01-23T15:15:42Z")
**Posts on this page:** 1
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### Author: ![jan](https://yyz2.discourse-cdn.com/free1/user_avatar/swi-prolog.discourse.group/jan/32/4_2.png) [@jan](https://swi-prolog.discourse.group/u/jan)
#### Post date: [January 23, 2020, 3:43pm UTC](https://swi-prolog.discourse.group/t/ann-swi-prolog-8-1-21/1778/5 "2020-01-23T15:43:05Z")

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> [@EricGT](#):
>
> I hope this is a valid reference: [Fuzzy-probabilistic logic for common sense](http://agi-conference.org/2012/wp-content/uploads/2012/12/paper_31.pdf)

I think the correct reference is [http://ceur-ws.org/Vol-2350/xposter1.pdf](http://ceur-ws.org/Vol-2350/xposter1.pdf)

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