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From: Daniel Fischer <daniel.is.fischer@web.de>
To: Mohamed <bishrma@yahoo.com>
Sent: Tue, October 19, 2010 4:36:37 PM
Subject: Re: [Haskell-beginners] small question

Hi,

On Tuesday 19 October 2010 16:13:05 you wrote:
> Hello folks,
>
> just a quickie here and would appreciate any help...

Stephen already told you that it should be

if (honesty volunteer) ...

, so

>
> In this expression:
>
> instance OBSERVATIONS Drinkability WaterWell Volunteer where
>    observe (Drinkability waterWell) volunteer = volunteer {vReport =
>        if (odorQuale (perceive (Odor waterWell) volunteer) == True &&
> clarityQuale (perceive (Clarity waterWell) volunteer) == True &&
> fullnessQuale (perceive (Fullness waterWell) volunteer) == True) then
> (if (honesty) then "drinkable" else "undrinkable") else (if (honesty)
> then "undrinkable" else "drinkable")}

Don't use 'if condition == True'.
For Bool values, (== True) is the identity function, so

'condition == True' is exactly the same as 'condition'.

Cheers,
Daniel