c:\@Work\Perl\monks>perl -wMstrict -le
"use Data::Dump qw(dd);
 ;;
 my @ra = ([ qw(fee fie foe) ], [ qw(original stuff) ], [ qw(uno dos tres) ]);
 dd \@ra;
 ;;
 my $hardref = [ @ra ];
 dd $hardref;
 print '-------------';
 ;;
 $hardref->[1] = 'ZOT!';
 $hardref->[0][2] = 'KAPOW!';
 $hardref->[2][1] = 'WHAM!';
 dd $hardref;
 dd \@ra;
"
[
  ["fee", "fie", "foe"],
  ["original", "stuff"],
  ["uno", "dos", "tres"],
]

[
  ["fee", "fie", "foe"],
  ["original", "stuff"],
  ["uno", "dos", "tres"],
]

-------------
[["fee", "fie", "KAPOW!"], "ZOT!", ["uno", "WHAM!", "tres"]]

[
  ["fee", "fie", "KAPOW!"],
  ["original", "stuff"],
  ["uno", "WHAM!", "tres"],
]