Our panel of 91 professional philosophers has responded to

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

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.