If there were no Americas, was Columbus adequately prepared to go west to India?

One other interesting item mentioned by Morison about the voyage:

In other words, Columbus decided to tell the crew that they had actually traveled less distance than he himself estimated, so that they would not become frightened by how far they were from land.

Ironically, though, Columbus ended up fooling even himself:

One other interesting item mentioned by Morison about the voyage:

In other words, Columbus decided to tell the crew that they had actually traveled less distance than he himself estimated, so that they would not become frightened by how far they were from land.

Ironically, though, Columbus ended up fooling even himself: