Two test cases:

[1,2,3,4,4,5] yields false

[1,2,3] yields true

If the original array without split can be a sub-sequence, then [1,2,3,4,4,5] can be a sub-sequence where 3 consecutive integers are present. So the result should be True.

If it's not, then how can [1,2,3] be True?