Final answer:
Greg's story includes descriptive information inconsistent with base rate information about ahi tuna being a saltwater fish, not found in ponds.
Step-by-step explanation:
Greg's story about the ahi tuna he almost caught involves descriptive information that is inconsistent with base rate information. The statement that the ahi tuna swam away across the pond is what gives away the inconsistency since ahi tuna are saltwater fish and do not live in ponds. People who fish often might not always give an accurate account of their fishing tales, either due to genuine misremembering or for the sake of a good story. Hence, it's common for fishermen to round up the weight of the fish they caught or embellish the details a bit.