The bristlecone pine dendrochronology extends to 8,000 years before present based on tree-ring pattern matching of living and dead trees and counting back from the present, assuming one ring per year. But if the Flood buried the world's trees in sediments, then there are no trees older than about 4,500 years, and chronology should not be any longer than that. Faced with this mystery, Christians may be tempted to doubt the veracity of the Genesis record. Some have claimed that multiple rings per year invalidate the dendrochronology because the 8,000 year dendrochronology is constructed assuming only one tree ring per year. Others have questioned the statistical significance of the tree-ring pattern matches but all the bristlecone pine tree-ring matching statistics are robust. These facts call for an evaluation of the primary assumption of dendrochronology, that matching tree-ring patterns prove two trees lived at the same time and experienced similar climate features. This paper challenges this assumption by a simulation where virtual post-Flood trees, all less than 4,500 years old, are used to construct an 8,000-year dendrochronology using the same methods employed in making the bristlecone pine dendrochronology. To achieve this result, disturbance patterns are introduced to the tree-ring patterns of those virtual trees growing within 1,500 years of the Flood, causing tree-ring patterns to match due to shared disturbance features rather than shared climate features, which falsely extends the chronology back beyond the date of the Flood. By itself, this simulation does not invalidate the bristlecone pine dendrochronology, but it does offer an alternative interpretation suggesting that the 8,000 years may be illusory. This alternative interpretation is consistent with the historical record of the Flood given in Genesis, encouraging Christians to trust the Bible.