Conveying information in a science article is easy: just say it. But when it comes to a science fiction story, it's not so simple. Consider this beginning for a story:
Jim Dyson dragged himself up the hospital steps, wheezing and stopping every three steps to catch his breath. Each time he put weight on his left leg, his knee burned like someone had driven a hot knife under the knee-cap. At least the knee pain took his mind off of his constant backache. What was the point of living to 94 if you felt like death warmed over? But damned if he was going to discarnate until Laura did.
Jimm is now Jim– obviously an adult, and in fact 94 years old and in poor health. But what’s going on in the last sentence? Jim isn’t planning to “discarnate?” What’s that all about?