Our panel of 91 professional philosophers has responded to

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

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.