Perceived problem: Bagels do not fit in toaster
Solution: Make toaster slot wider
New problem: Regular slices of bread lean to one side in the wider slot
Solution: Complicate toaster mechanism by adding a centering cage
New Problem: Toaster no longer hot enough to actually toast bread because of added width
Solution: Make toaster hotter
New Problem: Hotter toaster burns bagels (which fill the entire width)
Solution: Make toaster cooler
End result: Toaster moderately burns bagels and given enough time, somewhat toasts bread. Centering cage mechanism prone to failure. Toaster takes up more room on counter.
Problem solved: Bagels fit in toaster