# Hello, would you help a beginner? **URL:** \ **Category:** Help!\ **Tags:** raspberry-pi\ **Created:** [February 21, 2019, 1:30am UTC](https://swi-prolog.discourse.group/t/hello-would-you-help-a-beginner/310 "2019-02-21T01:30:13Z")\ **Posts on this page:** 6\ **Page:** 2
**Author:** ![yosoyquiensoy](https://yyz2.discourse-cdn.com/free1/user_avatar/swi-prolog.discourse.group/yosoyquiensoy/32/124_2.png) [@yosoyquiensoy](https://swi-prolog.discourse.group/u/yosoyquiensoy)\ **Post date:** [March 2, 2019, 7:24pm UTC](https://swi-prolog.discourse.group/t/hello-would-you-help-a-beginner/310/21 "2019-03-02T19:24:15Z")
Boris, this is becoming better. It’s almost good. Thanks. As you can see, some queries were not answered correctly by the program (I don’t know why). I’m content anyways. I didn’t understand when and where should i type the three backticks. ```prolog pi@raspberrypi:~ $ swipl Warning: Package bddem: no binary for architecture armhf Welcome to SWI-Prolog (Multi-threaded, 32 bits, Version 7.2.3) Copyright (c) 1990-2015 University of Amsterdam, VU Amsterdam SWI-Prolog comes with ABSOLUTELY NO WARRANTY. This is free software, and you are welcome to redistribute it under certain conditions. Please visit http://www.swi-prolog.org for details. For help, use ?- help(Topic). or ?- apropos(Word). ?- [office]. true. ?- supervises(black,green). true . ?- supervises(gray,green). false. ?- adminWorker(black). true. ?- supervises(brown,white). false. ?- supervises(brown, white). false. ?- supervises(brown,black). true . ?- trace. true. [trace] ?- notrace. true. [debug] ?- ``` ---
**Author:** ![yosoyquiensoy](https://yyz2.discourse-cdn.com/free1/user_avatar/swi-prolog.discourse.group/yosoyquiensoy/32/124_2.png) [@yosoyquiensoy](https://swi-prolog.discourse.group/u/yosoyquiensoy)\ **Post date:** [March 2, 2019, 7:44pm UTC](https://swi-prolog.discourse.group/t/hello-would-you-help-a-beginner/310/22 "2019-03-02T19:44:15Z")
?- trace. true. [trace] ?- supervises(who,green). Call: (7) supervises(who, green) ? skip Fail: (7) supervises(who, green) ? up false. [trace] ?- supervises(who, green). Call: (7) supervises(who, green) ? creep Call: (8) manager(who) ? creep Fail: (8) manager(who) ? creep Redo: (7) supervises(who, green) ? creep Call: (8) adminWorker(who) ? creep Fail: (8) adminWorker(who) ? creep Redo: (7) supervises(who, green) ? creep Call: (8) manager(who) ? creep Fail: (8) manager(who) ? creep Fail: (7) supervises(who, green) ? creep false. [trace] ?- notrace. true. [debug] ?- | | ---
**Author:** ![yosoyquiensoy](https://yyz2.discourse-cdn.com/free1/user_avatar/swi-prolog.discourse.group/yosoyquiensoy/32/124_2.png) [@yosoyquiensoy](https://swi-prolog.discourse.group/u/yosoyquiensoy)\ **Post date:** [March 2, 2019, 10:38pm UTC](https://swi-prolog.discourse.group/t/hello-would-you-help-a-beginner/310/23 "2019-03-02T22:38:54Z")
NOW IT LOOKS MORE LIKE MY BOOK. This is very good. - [office]. true. ?- trace. true. [trace] ?- supervises(\_G2345, green). Call: (7) supervises(\_G932, green) ? creep Call: (8) manager(\_G932) ? creep Exit: (8) manager(brown) ? creep Call: (8) adminWorker(green) ? creep Fail: (8) adminWorker(green) ? creep Redo: (8) manager(\_G932) ? creep Exit: (8) manager(grey) ? creep Call: (8) adminWorker(green) ? creep Fail: (8) adminWorker(green) ? creep Redo: (7) supervises(\_G932, green) ? creep Call: (8) adminWorker(\_G932) ? creep Exit: (8) adminWorker(black) ? creep Call: (8) officeJunior(green) ? creep Exit: (8) officeJunior(green) ? creep Exit: (7) supervises(black, green) ? creep \_G2345 = black . [trace] ?- ---
**Author:** ![yosoyquiensoy](https://yyz2.discourse-cdn.com/free1/user_avatar/swi-prolog.discourse.group/yosoyquiensoy/32/124_2.png) [@yosoyquiensoy](https://swi-prolog.discourse.group/u/yosoyquiensoy)\ **Post date:** [March 3, 2019, 12:13am UTC](https://swi-prolog.discourse.group/t/hello-would-you-help-a-beginner/310/24 "2019-03-03T00:13:00Z")
Boris, this is working not completely like the book. After the last query the expert system didn’t give the answer: “I guess that the animal es penguin”, But this is great advance, don’t you think? I just enter the into the train for a long trip to Siberia and i feel grateful and humble for your big help and the other professors, For help, use ?- help(Topic). or ?- apropos(Word). ?- [animal]. true. ?- go. Does the animal have the following attribute: has\_hair? yes. Does the animal have the following attribute: eats\_meat? |: yes. Does the animal have the following attribute: has\_tawny\_color? |: yes. Does the animal have the following attribute: has\_dark\_spots? |: no. Does the animal have the following attribute: has\_black\_stripes? |: yes. I guess that the animal is: tiger true. ?- go. Does the animal have the following attribute: has\_hair? no. Does the animal have the following attribute: gives\_milk? |: no. Does the animal have the following attribute: has\_feathers? |: yes. Does the animal have the following attribute: does\_not\_fly? |: yes. Does the animal have the following attribute: has\_long\_neck? |: no. Does the animal have the following attribute: swims? |: yes |: |: ---
**Author:** ![Boris](https://yyz2.discourse-cdn.com/free1/user_avatar/swi-prolog.discourse.group/boris/32/7486_2.png) [@Boris](https://swi-prolog.discourse.group/u/Boris)\ **Post date:** [March 3, 2019, 6:17am UTC](https://swi-prolog.discourse.group/t/hello-would-you-help-a-beginner/310/25 "2019-03-03T06:17:32Z")
What is your question??? ---
**Author:** ![yosoyquiensoy](https://yyz2.discourse-cdn.com/free1/user_avatar/swi-prolog.discourse.group/yosoyquiensoy/32/124_2.png) [@yosoyquiensoy](https://swi-prolog.discourse.group/u/yosoyquiensoy)\ **Post date:** [March 3, 2019, 7:45pm UTC](https://swi-prolog.discourse.group/t/hello-would-you-help-a-beginner/310/26 "2019-03-03T19:45:07Z")
> [@Boris](#): > > You should also use code blocks when you post such things. Put 4 spaces at the beginning of each line of code, or make code block by using 3 backticks on the top and the bottom of the code block: > > ```prolog > > ``` > > this is a code block > > ```prolog > > ``` Except for this suggestion made by you, I am good now. I’ll continue doing the exercises of my book. Thank you very much for your valuable help. [Previous page](https://swi-prolog.discourse.group/t/hello-would-you-help-a-beginner/310.md?page=1)