# No aliasing...
foreach my $thing (@array) {
# $thing is now an *alias* for something in @array
# In reality there is a layer of indirection here
# from the concept of $thing to the array, but you
# do not have to write the dereferencing since Perl
# hid it for you in $thing
# ...
}
# Alias over
See? There is indirection needed to do what happens
in that loop, but you don't have to think about it, and
it does not appear as explicit dereferences in your code.
It just works.
That is the difference between an alias and a reference.
With a reference the indirection shows up as your having
to tell Perl to dereference things. With an alias it is
hidden inside the definition of the variable.
That is an amusing difference between Perl and, say, C.
The same code written in C is in reality more direct than
in Perl. But the Perl code *looks* more direct because
you don't see the indirections... | 
