Our panel of 91 professional philosophers has responded to

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

Question of the Day

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.