Bug or feature: IsDefined and intersection of lines
In the input field, type:
x = 1
y = 1
Then, construct the intersection of these two lines (the point A).
In the input field, type
The answer is true.
Now change the equation "y = 1" to "x = 2". The Algebra View shows:
A = undefined
but IsDefined[A] still returns true.
Curiously, IsDefined works well with intersection of segments.
Is this behaviour correct?
Thanks in advance, Humberto.