Our panel of 91 professional philosophers has responded to

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

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.