Our panel of 91 professional philosophers has responded to

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

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.