The lecturer, providing some additional to the article information, argues against its main theories of the Mary Celeste’s mystery.
Both the article and the lecture agrees that the disappearence of the team of the ship is a mystery, which no-one can explain for sure.
According to the article, one of the most reliable theories is that it was a crew of the ship, who made a mutiny and killed the captain of the ship and all the passengers. However, contradicting this theory, the lecturer states that the captain of the boat was very experienced and the team had a good reputation to exclude this theory from the list.
Another explanation of the “ghost ship”, provided by the article, is that it was a crew of the boat, which found Mary Celeste, who killed everybody on the ship to remove the evidence of taking some valuables from the ship. Conversely, the lecturer proving the invalidity of this theory describes the captain of the rescuing ship as a friend of Mr. Briggs, the captain of Mary Celeste.
Contadicting the theories from the passage, the lecturer provides us with another one, which, he thinks, is the most valuable. He thinks that it was because of a danger of alcohol fumes explosion on the boat, that made the team and all the passengers leave the ship on an emergency boat, not even taking the minimum of their stuff.
Thus the artcle and the lecturer stronlgy argues against each other providing some controversial theories.

The article states two possible reasons to explain about the mystery of the Mary Celeste event. This ship called “the ghost ship” was found abandoned on the Portugal coast in 1872. However, the professor refutes the two reasons presented by the article and states another possible explanation.

First, the reading states the hypothesis of a mutiny aboard and the killing of the captain and his family by the crew. In this case the crew will have abandon the ship afterwards. The professor refutes this point. He states that the captain of Mary Celeste was a respected person and the crew had a good reputation. The fact that the ship was found with all the personal belongings of everybody creates doubt in the mutiny theory.

Second, the article claims that the crew who found the Mary Celeste was responsible of its robbery and assassination of the captain and his crew. However, the professor says that the captain of the ship that found Mary Celeste was a very close friend of Mary Celeste’s captain. He explains that no evidence was found to suspect such accusation.

Finally, the professor states that the abandon of Mary Celeste might occur due to a fear of fire. The ship was transporting a huge amount of alcohol and it was the first time for the captain and his crew to be in charge of this kind of goods. He explains that probably the captain was nervous about the leak of the alcohol and this has caused the abandon of the ship by the captain and his crew.

According to the passage, what happened to the ship Mary Celeste was unknown for many years. Therefore, two possible explanations were given. One of both was that the captain and his family were killed then the crew stole part of barrels of alcohol on the ship. The second one was that the crew and passengers on Mary Celeste were killed after some valuable things had been stolen by people who explored the ship. On the other hand, the lecture states that Benjamin Briggs was a honored and powerful captain, so he could not be killed. Moreover, his ship had never carried alcohol before, so there may be an explosion caused by alcohol, but the ship had no damage. What is more, the professor mentions about an evidence of opened hatches and portoles to support his idea above- a new explanation.
Finally, the mystery of the ship Mary Celeste and the reason that some barrels of alcohol were empty on this ship are still not explained appropriately.

A man talks about the Mary Celeste’s mystery. He augues in the talk that the mysteries mentionede in the reading passage are inaccurate. He uses some reasons to claim that his theory is more desent than the theories in the reading passage.
First of all, he states that the captain was respected by the crews so that crews must not be the ones who killed the captain. He also says that the captain had good reputations among the crews. He claims the one of the points in the reading which says that the crews killed the captian.
Second of all, he says that the crew who found the Mary Celeste was a captain’s friend. The man insists that the crew found the ship not to receive the rewards but to contribute to solve the mystery as a frind of the captain.
At last, he says that the ship was evacuated by the captain’s decision that is made because of the alcohol leak. According to the man, it was the captain’s first time to carry alcohole, and when he found out about the leak, he became very worry about catching fire on the leaking alcohol. Thus the crews abandoned the ship to escape, but died from the starvation and also not having enough water on the lifeboats.