A. congratulations!You are right!Do you have a rigorous logic ability, has had potential as a detective.

B. it's a pity, you choose the wrong.Case analysis is as follows:

Confessions (2) and (4) at least one was telling the truth.

If (2) and (4) is true, that is Curtis Dwight killed;So, according to the Ⅰ, (5) and (6) are all lies.

But if it is Curtis Dwight killed, (5) and (6) can not be untrue.Curtis, therefore, did not kill Dwight.

Then, (2) and (4) there is only one was telling the truth.

According to Ⅱ, (1), (3) and (5) can't be only one was telling the truth, and, according to Ⅰ now (1), (3) and (5) there can be at most one is the truth.

So (1), (3) and (5) is false, only (6) is also a true confession.

Due to (6) is telling the truth, so does a lawyer kill Dwight.

Also because, according to the previous reasoning, Curtis did not kill Dwight;(3) is untrue, namely barney is not a lawyer;(1) is true that Albert was a lawyer.

Thus, (4) is telling the truth, (2) is false, so, the murderer will be vividly portrayed, who is he?According to the above analysis it one more try!!!!(Psychological tests /test/)

C. it's a pity, you choose the wrong.Case analysis is as follows:

Confessions (2) and (4) at least one was telling the truth.

If (2) and (4) is true, that is Curtis Dwight killed;So, according to the Ⅰ, (5) and (6) are all lies.

But if it is Curtis Dwight killed, (5) and (6) can not be untrue.Curtis, therefore, did not kill Dwight.

Then, (2) and (4) there is only one was telling the truth.

According to Ⅱ, (1), (3) and (5) can't be only one was telling the truth, and, according to Ⅰ now (1), (3) and (5) there can be at most one is the truth.

So (1), (3) and (5) is false, only (6) is also a true confession.

Due to (6) is telling the truth, so does a lawyer kill Dwight.

Also because, according to the previous reasoning, Curtis did not kill Dwight;(3) is untrue, namely barney is not a lawyer;(1) is true that Albert was a lawyer.

Thus, (4) is telling the truth, (2) is false, so, the murderer will be vividly portrayed, who is he?According to the above analysis it one more try!!!!