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ir/rational Redux

rated 4.24 / 5 stars
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Puzzles - Other

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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

i luv syllogisms


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)


Rated 4.5 / 5 stars

if you think long enough about a question the logical answer will show its self wether or not you are logical human being or not... (possibly my highest rating for anything ever congradulations)


Rated 4 / 5 stars

Level 9 was probably the worst, because it is the only level in which a statement is repeated word for word. Not only word for word, but back to back. This lead me to assume I had the answer wrong.


Rated 5 / 5 stars

I love that game. Im really hoping there is a sequel.
Thanks for the game! i really like games that make you think