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ir/rational Redux

rated 4.24 / 5 stars
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Puzzles - Other

Credits & Info

Jul 8, 2012 | 6:59 AM EDT

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Author Comments

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

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: /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:
My narrative design blog, Plot is Gameplay's Bitch:

- 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!



Rated 4.5 / 5 stars

Very interesting game. Had quite some fun with it. It's simple and efficient, like a puzzle game should. Great job at making every pieces fit together nicely !
The difficulty is perfect for an"all public" audience I think. Which is hard to achieve I guess.

Another layer of difficulty could be implemented easily if you plan on making a sequel : have multiple "machines / people / whatever" give the player the assertions, and gradually increase the challenge by making them possible lyers (always lying first, and then possibly lying).
This way, you can increase difficulty at will without relying on multiplicating assertions that much. And without sentences with actual double negatives.


Rated 4 / 5 stars

folks, any proofs you did in math will help here-thinking-wise. I love how complex, but simple this game is. nicely done.


Rated 4.5 / 5 stars

Great game and great idea -gave it a feel like Portal and GlaDos... though i would LOVE to give a 5 out of 5 for the idea and good gameplay, there are some recommendations i would like to make:
1) Anyone who has taken the basic of the basics of Logic in math will be able to solve this (i know the last level was to up it a notch by adding the law of contrapositive but still easy) perhaps another version of this (i hope for a sequel with more story!) can have more challenging laws (without the little helping symbols, add random laws -modus tollens, double-negation, etc. every logic law is simple so it wont be hard for the players to figure out)
2)Contradicting the Machine did not really prove much difficulty logic-wise and in fact theoretically incorrect in contradicting the machine -there must be two completely opposite beliefs still made to be proved and believed by the machine -here is a good example: This is an apple. The statement is not true. (because the object is an apple but the statement right after is indicating that it is not an apple -but the term "statement" means a logically sound conclusion -THIS IS A REAL CONTRADICTION to the machine ever since it goes by the dictionary terms (like in the beginning where it says a dictionary definition) ATTENTION: because i believed this was the real contradiction form i spent loads of time until i accidentally stumbled on the answer and realized how simple and incorrect it was logically (though seemingly to many it sounds contradictory it is not if scrutinized).
3) I was hoping for some music :) or a better looking machine (also hoped that it was in Morse code so i can have some fun decoding it)
4) WATCH OUT for crazy religious zealots out there who will tear that proof about no perfect god.
5)The ending was okay but it could of have been a LOT better if we saw another man being put into this room by robots or humans or demons (whatsoever!) and fading out to darkness or perhaps even zooming out and showing multiple of these rooms and zoom further out to a screen watching this and boom -pitch black. Setting it up for a nice sequel Ohhhh Yeah
( âEU¢ _ âEU¢ )>âOEâ- -â-
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tjubert responds:

The problem I'm going to have to overcome as I develop the ideafurther will be that usually the more challenging arguments are incredibly messy to print in their language form as opposed to symbol form. Double negaives etc are going to be essential, but it's going to read awfully badly.

Thanks for you feedback, anyway! I read all the commnts, and it's all going towards maing the next game loads better.


Rated 5 / 5 stars

Excellent, a flash game that makes you think. I thank you for this treat.

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Rated 5 / 5 stars

For the last level, try replacing all the letters with words you know just as cat, dog etc, and it'll be actually very easy

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