If both vectors originate on (0,0) the two vectors can never be collinear as the[y] are not parallel and touch at (0,0).

What makes you think the two vectors are not parallel?

Fixed in Java, Crystal, and R. If there are any other languages that generate tests with less than 4 numbers, let me know.

Fixed the Java tests so they no longer generate incorrect ones.

Approved by someone

The descrition mentions arrays of at least 4 numbers, in reality arrays of length 0 and 1 are passed.
this is evident by the out of bound erros when accessing the elements.

the description should be updated

All test pass but Test4 in JAva.
I tried to cast to int, round, floor and ceil the division when I calculate the mean.
What values are in test4?
I cannot find why it is failing!

I think that it should be clearly stated that an empty string should return true.
If x is not present it cannot be followed by y, there fore is cannot be true