If that's the case, why did you make that claim?
because I can?
Well, some evidence is the measurement of downward IR at night, when the Sun can't be the source.
doesn't mean it's back radiation. Why can't it be incoming IR absorbed and radiated?
Why is a desert so cold at night?
Besides a temperature above 0K, what other conditions do you feel apply?
temperature
CO2 slows the escape of IR into space
you can't prove that at all, so you have no evidence, so it's you just making a statement like me.
If a photon is absorbed in the atmosphere, instead of escaping, immediately, that is slower.
What more evidence do you need?
In your scenario, isn't it re-emitted? how fast do you think that is? so not sure the slow down, it is all done very quickly
doesn't mean it's back radiation. Why can't it be incoming IR absorbed and radiated?
Incoming solar radiation absorbed and radiated by what? Still working its way down hours after the Sun sets?
Why is a desert so cold at night?
Less, but not zero, back radiation.
Besides a temperature above 0K, what other conditions do you feel apply?
temperature
That's the only condition.
In your scenario, isn't it re-emitted?
In reality, it is re-emitted. You feel it isn't.
how fast do you think that is?
Pretty fast.