Our panel of 91 professional philosophers has responded to

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

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.