`---------------------------------------------------------
$this && $that | If $this is true, and $that is true
| return the value of the last
| expression evaluated ($that).
-----------------+---------------------------------------
$this || $that | If $this evaluates true, stop
| evaluating, we're done. Otherwise
| evaluate $that for truthfulness.
| If $that evaluates true, return
| the value of $that.
---------------------------------------------------------
`

That doesn't explain what is returned if $that is false.
May I suggest the following (which is shorter, symmetric,
and explains the return value on failure).

`---------------------------------------------------------
$this && $that | If $this is true, return $that,
| else return $this.
-----------------+---------------------------------------
$this || $that | If $this is true, return $this,
| else return $that.
---------------------------------------------------------
`

Abigail

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