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Jul 8, 2012 | 6:59 AM EDT
  • Daily 2nd Place July 9, 2012

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UPDATE 4 (8th September 2012): IR/RATIONAL INVESTIGATOR ANNOUNCED!

http://steamcommunity.com /sharedfiles/filedetails/
?id=92933628&searchtext=

UPDATE 3: ir/rational has made the front page with 45,000 plays in under a week! Thank you everyone - and keep your eyes peeled for announcements in the coming months!

UPDATE 2: Walkthrough available here: http://blog.tomjubert.com /2012/07/irrational-walkt hrough.html

UPDATE 1: Made 10,000 views and the Popular Games list in 24 hours! Thanks to everyone who's played!

Argue the toss in a twisted tale of logic...

In ir/rational you complete, create and discredit arguments by selecting propositions and filling in the blanks. It's a puzzle game based on propositional logic, and a graphic adventure all in one - only here you don't so much need to escape the room as prove why you'd even want to.

- Unique, language-based argument system: formulate logical proofs to progress through the game

- Dark philosophical comedy by Tom Jubert, writer of Penumbra, Driver: San Francisco and FTL.

- 10 screens and roughly half an hour of intelligent, challenging and inventive gameplay

- Musical score by award-winning composer Mikko Tarmia

My website: www.tomjubert.com
My narrative design blog, Plot is Gameplay's Bitch: blog.tomjubert.com

Instructions:
- Click to progress story
- Complete the arguments by selecting options from the drop-down menus

NB Some systems don't display all the dropdown options at once, and you have to use the arrow keys to scroll.

If you can't see the right answer, chances are you can resolve the problem with the arrow keys. Hope it's not dampened your enthusiasm!

Reviews


SlowAsATurtleCanBeSlowAsATurtleCanBe

Rated 5 / 5 stars

The much requested walkthrough for ir/rational. I'm glad enough people are playing it to highlight how all over the place the difficulty curve is!
I've also included the logical symbol form of each argument (however you may find mistakes and changes here and there in those - they're just from my notes).
Level II
1. I would like the lights to come on
2. IF I would like the lights to come on THEN I should press the switch
3. THEREFORE I should press the switch
B
B implies A
A
Level III
1. Many people believe that a perfect God exists
2. IF many people believe that a perfect God exists AND that belief is not in error THEN a perfect God exists
3. IF a perfect God exists THEN he would not allow that belief to be in error
4. Assumption: A perfect God exists
5. THEREFORE The belief is not in error
6. THEREFORE Many people believe that a perfect God exists AND that belief is not in error
7. THEREFORE A perfect God existsA
A n B > C
C > B
Assumption: C
Therefore B
Therefore A n B
Therefore C
Level IV
1. IF I am alive THEN I am breathing oxygen OR the laws of human biology have been broken
2. I am alive AND the laws of human biology havenâEUTMt been broken
3. THEREFORE I am breathing oxygen
A > C u B
A n ¬B
Therefore C
Level V
1. IF Jack OR Jill is ill THEN no one will fetch any water
2. IF Jill has eaten her Weetabix THEN she will not fall ill
3. No one has fetched any water
4. Jill has eaten her Weetabix
5. THEREFORE Jack is ill AND Jill is not ill
A u B > ¬C
D > ¬B
¬C
D
Therefore A
Level VI
1. IF the prime directive is to assess me AND The Machine always follows its prime directive THEN The Machine must assess me
2. IF The Machine releases me THEN it cannot assess me
3. The Machine always follows its prime directive
4. The prime directive is to assess me
5. THEREFORE The Machine must assess me
6. THEREFORE The Machine cannot release me
A n B > C
D > ¬C If The Machine releases me, then it cannot test me
A The Machine must follow its objective
B The prime directive is to assess me
Therefore C The Machine must assess me
Therefore ¬D The Machine cannot release me
Level VII
1. IF there is no evidence that video games are more dangerous than films THEN video games should be treated similarly to films
2. IF video games should be treated similarly to films THEN Australia is wrong to ban 18+ video games
3. IF (Oz Attorney General) Michael Atkinson parks in disabled spaces OR Australia is wrong to ban video games THEN he is a douche
4. There is no evidence that video games are more dangerous than films
5. THEREFORE video games should be treated similarly to film
6. THEREFORE Australia is wrong to ban 18+ rated games
7. THEREFORE Michael Atkinson is a douche
A > B
B > C
D u C > E
A
Therefore B
Therefore C
Therefore E
Level VIII
1. IF AND ONLY IF The Machine will kill me when it catches me AND there is a good chance I will be caught should I THEN not try to escape
2. EITHER I am an escape artist of worldwide renown OR there is a good chance I will be caught
3. I am not an escape artist of worldwide renown
4. THEREFORE there is a good chance I will be caught
5. IF The Machine kills me when it catches me THEN I will be a very sad bunny AND it will fail its mission to assess me
6. The Machine cannot fail in its mission
7. THEREFORE The Machine will not kill me if it catches me
8. THEREFORE I should try to escape
Level IX
1. IF The Machine has contradicted itself THEN The Machine is not perfect
2. The Machine thinks smugness is a red herring
3. The Machine thinks smugness is a relevant clue
4. IF The Machine thinks smugness is a relevant clue AND The Machine thinks smugness is a red herring THEN The Machine has contradicted itself
5. THEREFORE The Machine has contradicted itself
6. THEREFORE The Machine is not perfect
C
D
A > B
C n D > A
THEREFORE A
THEREFORE B
Level X
G
¬μ = NOT μ
θ Î> Я = θ AND Я
Ω V â^ = Ω OR â^
Ð- ât' Ф = IF Ð- THEN Ф
â*z β = THEREFORE β
M ât' (G ât' A)
M
â*z A
M Î> A ât' ¬E
â*z ¬E
O Î> V ât' ¬E V R
â*z O



kakaapkakaap

Rated 4 / 5 stars

Entertaining, but the puzzles were too easy. It was really just filling in the logical blanks, a sound reasoning person should be able to do this. So, too vertical in my opinion, throw some lateral thinking in the mix next time!



MasterGentlemanMasterGentleman

Rated 5 / 5 stars

I'll be honest, I completely guessed on Question Ten and I still got it right...somehow.



TageuerTageuer

Rated 4.5 / 5 stars

i luv syllogisms



ViwrinnViwrinn

Rated 4 / 5 stars

Lots of fun, very well done. It's rare to find an entertaining intellectual game. Luckily for me, I'm a math major studying discrete data structures (and logical reasoning is a huge part of it), so this wasn't too difficult for me.

Note: for those who struggle on puzzle 10 and don't understand symbolized reasoning, here's a quick and simple crash course. Each letter can be considered it's own separate statement. a '/\' separating 2 letters means "this AND that", where as a '\/' means "this OR that". A --> arrow means "implies", where as a <--> arrow means "is equivalent to". Here's an easy example:
I'll put what each letter could stand for
A (swans are white)
B (swans are big)
A/\B ---> C (If swans are big AND white then it is implied that swans are beautiful)
C (therefore, swans are beautiful)