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"Supposed" error? Bullshit. You claimed that rational arithmetic is closed under all the operations in that equation. It has been shown otherwise but you won't admit you were wrong. It is pathetic.

What is pathetic is your grasping at some imagined dragon. Don Quixote has nothing on you.

This is the context of my statement.

Plus your gambling problem does not help your argument either. Notice that the summation for the calculation of pi has a symbol on top. That means something.
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And the set of rationals is closed when using all of the operations in the equation.

"That means something" means something. This was your conclusion So you don't know what that little "sideways eight" atop the sigma symbol means? Sad.

You are just as wrong now.

Ah, the old throwing dust in their eyes trick. I'm not going to let you get away with it. You said "and the set of rationals is closed when using all of the operations in the equation." That is wrong. It has been shown to be wrong. You should cut your losses and admit it.

My questioning whether you understood the meaning of that symbol in the equation is simply explained. Since rational arithmetic is not closed under that operation, I figured you didn't understand its meaning. As you showed later, you did (which I acknowledged here).

But your claim about closure is still wrong. And you still trying to bluff it out.