Undetermined vs. Undefined
158420
Is $\frac00=\infty$? And what is $\frac10$? Are they same? Does it hold true for any constant $a$ in $\frac{a}0$
1340
What are "sequence points" and how do they affect undefined behavior?
27606
Detecting an undefined object property
71634
Can a variable be defined only in the scope of an if-statement, similar to how it's often done for for-loops?
67387
Not really sure vs. really not sure
6294
What are all the common undefined behaviours that a C++ programmer should know about?
56113
Operator precedence with Javascript Ternary operator
46477
How to understand nil vs. empty vs. blank in Ruby
49446
How to check for an undefined or null variable in JavaScript?
94589
Why this very simple problem turns to "Indeterminate"?
96061
Console returns undefined
80488
Explanation of method for showing that $\frac{0}{0}$ is undefined
118617
Completeness and Incompleteness
64563
What is the difference between Gödel's completeness and incompleteness theorems?
154299
Is the output of printf ("%d %d", c++, c); also undefined?
134996
How can I temporarily disable the "return value might be undefined" warning?
157402
Hidden variables in probability