Our panel of 91 professional philosophers has responded to

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

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.