Many creationists believe that Gosse took the appearance of age too far and have either rejected his theory or modified it to better suit their needs. They then emphasized the theological importance of this "grown creation." Whitcomb (1972) published a more recent book discussing appearance of age titled The Early Earth.One such creationist who has modified Gosse's theories on appearance of age is John C. In it, he argues that belief in creation with an appearance of age is a necessary part of Christian theology for various reasons, including the miracles of Jesus.Also, there are fossil zones in the layers of rock that suggest millions of years of successive origination and extinction of species.To a creationist this can all be explained by simply stating that God created the earth a few thousand years ago with the geological and fossil record fully intact.Its usefulness to creationists is that, in their minds, it deals with all challenges to a young earth model of creation simultaneously.
Finally, one of the most compelling arguments for an old earth is radiometric dating.
When Jesus cured blindness or healed Lazarus, the people being healed were given the appearance that they had lived lives free of their ailments, when in fact they had not.
Whitcomb cites these stories in the New Testament as examples in addition to the creation story in Genesis of an apparent but counterfactual history in the Bible.
The Garden of Eden poses other problems with the young earth model that appearance of age supposedly explains.
If God created plants and animals within the same six day period as He created Adam and Eve, then He must have created the plants and animals in a fully grown state so that they could serve as a food source.
The result of all this to a creationist is that every piece of scientific evidence supporting an old earth can be explained away by saying that God simply created it to appear old.