Bit-wise AND and a Normal AND [closed]

Possible Duplicate:

Why && and not &

I would just want to know, when would i use a Bit-wise AND a normal AND.
I read the a Bit-wise AND is good for applications that has a memory limit.

Which 1 will be the best to use then, overall?

if (true & false)
 {
 
 }
 

or

if (true && false)
 {
 
 }
 

Wouldn't it be better to always use a Bit-wise AND then?

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