Treating A Table Field As A Boolean Value In A Query...help!

I wanted to test how SQL server 2005 works with Boolean values.
so I created this table


SET ANSI_NULLS ON

GO

SET QUOTED_IDENTIFIER ON

GO

CREATE TABLE [dbo].[BoolTest](

[ID] [int] IDENTITY(1,1) NOT NULL,

[Operand1] [bit] NULL,

[Operand2] [bit] NULL,

CONSTRAINT [PK_BoolTest] PRIMARY KEY CLUSTERED

(

[ID] ASC

)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]

) ON [PRIMARY]


I populated it like so

insert dbo.booltest (operand1, operand2) values (1,1)

insert dbo.booltest values (1,0)

insert dbo.booltest values (1,null)

insert dbo.booltest values (0,0)

insert dbo.booltest values (0,null)




Then I tried this


select case when operand1 OR operand2 then 'True' else 'False' End
from dbo.booltest where id=1

thinking that since row 1 has 1 and 1 I'll get 'True' as a string showing in the output window

but instead I got this error


Msg 4145, Level 15, State 1, Line 1

An expression of non-boolean type specified in a context where a condition is expected, near 'OR'.


question:
how do you work with bit value table Fields as booleans in a boolean test

many thanks in advance for your time/help
CarlitoA