Meaning of sentence

[Tan Elaine]

I would have had to be Helen Keller not to have seen that one coming.

I read the above sentence and wonder what it means? Please let me know what it means.

Thanks in advance.

 

[kfredson]

I would have had to be Helen Keller not to have seen that one coming.

I read the above sentence and wonder what it means? Please let me know what it means.

Thanks in advance.

Helen Keller was blind.

 

[tedtmc]

Helen Keller was blind.

She was also deaf but was a great writer.