Irony or coincidence.

Generally I have no problem with the two terms.  Much that is called irony is merely coincidence.  But sometimes, I’ll admit it, I get them confused.

So is it ironic or just a coincidence that Illinois lawyer and Presidential Candidate, Abraham Lincoln gave his “House Divided” speech this day in 1858?

In part, Lincoln said, “A house divided against itself cannot stand. I believe this government cannot endure, permanently, half slave and half free. I do not expect the Union to be dissolved — I do not expect the house to fall — but I do expect it will cease to be divided. It will become all one thing or all the other. Either the opponents of slavery will arrest the further spread of it, and place it where the public mind shall rest in the belief that it is in the course of ultimate extinction; or its advocates will push it forward, till it shall become lawful in all the States, old as well as new — North as well as South.”

Irony?

Coincidence?

Or both?