In python tests,

[[5 3 4 6 7 8 9 1 2]
[6 7 2 1 9 0 3 4 9]
[1 0 0 3 4 2 5 6 0]
[8 5 9 7 6 1 0 2 0]
[4 2 6 8 5 3 7 9 1]
[7 1 3 9 2 4 8 5 6]
[9 0 1 5 3 7 2 1 4]
[2 8 7 4 1 9 6 3 5]
[3 0 0 4 8 1 1 7 9]]

expects true (but there are zeros in matrix)

as does:
[[5 3 4 6 7 8 9 1 2]
[6 7 2 1 9 0 3 4 9]
[1 0 0 3 4 2 5 6 0]
[8 5 9 7 6 1 0 2 0]
[4 2 6 8 5 3 7 9 1]
[7 1 3 9 2 4 8 5 6]
[9 0 1 5 3 7 2 1 4]
[2 8 7 4 1 9 6 3 5]
[3 0 0 4 8 1 1 7 9]]

(again zeros in matrix)

and

[[1 3 2 5 7 9 4 6 8]
[4 9 8 2 6 1 3 7 5]
[7 5 6 3 8 4 2 1 9]
[6 4 3 1 5 8 7 9 2]
[5 2 1 7 9 3 8 4 6]
[9 8 7 4 2 6 5 3 1]
[2 1 4 9 3 5 6 8 7]
[3 6 5 8 1 7 9 2 4]
[8 7 9 6 4 2 1 3 5]]

also expects true despite having 2 fives in last column

In python

[[5 3 4 6 7 8 9 1 2]
[6 7 2 1 9 0 3 4 9]
[1 0 0 3 4 2 5 6 0]
[8 5 9 7 6 1 0 2 0]
[4 2 6 8 5 3 7 9 1]
[7 1 3 9 2 4 8 5 6]
[9 0 1 5 3 7 2 1 4]
[2 8 7 4 1 9 6 3 5]
[3 0 0 4 8 1 1 7 9]]

expected to be true, but is false (zeros in last row)

and also:

[[1 3 2 5 7 9 4 6 8]
[4 9 8 2 6 1 3 7 5]
[7 5 6 3 8 4 2 1 9]
[6 4 3 1 5 8 7 9 2]
[5 2 1 7 9 3 8 4 6]
[9 8 7 4 2 6 5 3 1]
[2 1 4 9 3 5 6 8 7]
[3 6 5 8 1 7 9 2 4]
[8 7 9 6 4 2 1 3 5]]

expected to be true, but is also false (mulplte 5s in last column)