Our panel of 91 professional philosophers has responded to

374
 questions about 
Logic
27
 questions about 
Gender
67
 questions about 
Feminism
110
 questions about 
Biology
70
 questions about 
Truth
36
 questions about 
Literature
392
 questions about 
Religion
4
 questions about 
Economics
54
 questions about 
Medicine
89
 questions about 
Law
170
 questions about 
Freedom
218
 questions about 
Education
75
 questions about 
Perception
244
 questions about 
Justice
51
 questions about 
War
32
 questions about 
Sport
154
 questions about 
Sex
68
 questions about 
Happiness
5
 questions about 
Euthanasia
574
 questions about 
Philosophy
117
 questions about 
Children
221
 questions about 
Value
124
 questions about 
Profession
58
 questions about 
Abortion
282
 questions about 
Knowledge
88
 questions about 
Physics
134
 questions about 
Love
81
 questions about 
Identity
151
 questions about 
Existence
96
 questions about 
Time
105
 questions about 
Art
43
 questions about 
Color
31
 questions about 
Space
208
 questions about 
Science
24
 questions about 
Suicide
80
 questions about 
Death
75
 questions about 
Beauty
1280
 questions about 
Ethics
110
 questions about 
Animals
284
 questions about 
Mind
2
 questions about 
Action
58
 questions about 
Punishment
77
 questions about 
Emotion
69
 questions about 
Business
23
 questions about 
History
39
 questions about 
Race
2
 questions about 
Culture
287
 questions about 
Language
34
 questions about 
Music

ask a question

recent responses

all topics

info

⚲

Question of the Day

Hello! I'd like to ask about syllogisms. I have a particular problem when understanding this certain syllogism: Some girls are single. Some girls are sad. Therefore, some girls are single and sad. While I think it is valid, I cannot fully make an accurate explanation as to why it is. Hoping somebody could help me. Thanks!

The syllogism in question is not valid. Nothing logically guarantees that the set of single girls and the set of sad girls overlap. Even if both sets have members, it does not follow that they have any members in common. Compare: Some polygons are squares. Some polygons are triangles. But it is false that some polygons are square triangles.