How to resolve the premise of the syllogism type

Questions logical judgment of the syllogism premise type topics, sometimes complicated conditions, many candidates alike, and even directly to give up. However, such title does have a unique problem-solving ideas. Now share with you several high efficiency of the solution for this type of exercise.
Questions such casual working title is generally composed of several premises and a conclusion, and the question is asked and more obvious, such as "Which of the following, if true, can best ensure that the establishment of these conclusions," or "to make the above argument establishment, which of the following must be added as a precondition. " Next we look at the problem-solving elements.
First aspect: the concept is now three
phrase well understood, research is syllogism transfer between the three different concepts, each concept and appears twice. If there is a concept A and concept B premise, the conclusion and the emergence of the concept A concept C, then our answer must be judged a concept C and concepts associated with B, we can rule out those options include the Concept A. Give you an example:
Some people are single fold, so some people are lovely small.
Which of the following, if true, can best ensure that the establishment of these conclusions?
A small owner is lovely
B Some single fold
C folds of all people is a small cute
D is some small lovely people
of this question is the relationship between people and currently mention a single fold, concluded that the relationship between man and little cute, so need to be supplemented options relations between a small single fold and lovely, only C accord.
Second point: "all" must
mean that premise must appear at least once with a judge "all" quantifier. If the premise is based on "some" at the beginning of the judgment. The conclusion is to "some" judgment at the beginning, then add a certain premise is "all" at the beginning of the judgment. For example:
Some people are fairies single fold, so some people are cute little rascal.
Which of the following, if true, can best ensure that the establishment of these conclusions?
A single fold is all cute little
B Some single fold
C folds are some lovely small
D is some small lovely people
this question the premise that the purpose of special, said proposition, the conclusion is special, said proposition, you need to add the premise must be with "all" proposition, only A in line.
Third point: "definitely" must have
meant the premise of the relationship between the three concepts must be at least a group of contacts is a positive association, that is the premise of "Yes" judgment of the word must appear with at least one judge. If the premise is a negative proposition, the conclusion is negative proposition, then add the premise is certainly a positive proposition. For example:
everyone is not goblins, so everyone is not a bad guy.
Which of the following, if true, can best ensure that the establishment of these conclusions?
A bad guys are all fairy
B some people are not fairies
C some of the fairies are not the bad guys
D all the bad guys are not people
we have introduced to these three points, but we still need to be able to understand the specific title, but these three principles in particular the title can be used simultaneously. We hope to help you!