Am I fundamentally misunderstanding Ruby here? I've been writing Ruby code for about 2 years now and just today stumbled on this...

```
ruby-1.8.7-p249 > i = true and false
 => false 
ruby-1.8.7-p249 > i
 => true 

```

Could somebody explain what's going on here please? I'm sure it's to spec, but it just seems counter intuitive to me...