Misleading info on EC & Key Pairs Part 2 slides.

The SSH Keys Exam Tips suggests you should take a snapshot of the EC2 instance and deploy it as a new instance if you lose a key pair (public or private).  This isn’t really true, is it?  If you were to lose the just public key, you could ssh into the EC2 instance with the private key and get the public key.  Or am I confused?