Now listen to part of a lecture on the topic you just read about. The reasons for thinking that the person buried in this grave was king Ravel are actually not as convincing as the reading suggests. First, the dating argument. It's actually not easy to pinpoint the exact dates of the objects and events the passage refers to. Take the date of king Ravel’s death. It's true that one historical record suggests it was 624. But there's another source that places his death 25 years earlier. And the dating of the coins is somewhat uncertain as well. Recent analysis puts the dates of the coin several years after the date of king Ravel’s death proposed in the reading. So we cannot really match the objects in the grave with the date of king Ravel’s death very accurately. Second, we cannot really say whether the grave was truly exceptional. That's because there are almost no well preserved graves from that period we can compare to. Only a small number of graves from that period have ever been found, and it's clear that many precious objects were removed from those graves by robbers over the years. So well this particular grave seems impressive. We don't really know whether it was more impressive and more splendid than all other graves at the time. So we cannot be sure for a grave of the king who was more powerful than the other kings. Third, we cannot even be sure that the person buried in the grave was a Christian, bearing a person with a ship and precious possessions was not a Christian burial practice, but a practice associated with earlier non Christian kings. And those spoons engraved with Christian names, don't necessarily mean the king was a Christian himself. Maybe he just received the spoons from a Christian individual as a gift. And they ended up in the grave because they were made of silver and were valuable. Summarize the points made in the lecture, being sure to explain how they Challenge the specific arguments made in the reading passage.