a syllogism is a type of logical argument. It consists of three parts:
1) Major Premise
2) Minor Premise
3) Conclusion
Example (weak argument):
All blondes are empty-headed
S is a blonde
Therefore S is empty-headed
Example (strong argument):
All unmarried men are bachelors
S is an unmarried man
Therefore S is a bachelor.
Use in a sentence:
X's argument was unpersuasive as it was based on the use of faulty (or weak) syllogism