Please excuse me, but I've thought of a much better example. Quoting Wiki 'The Lambda-CDM concordance model describes the evolution of the universe from a very uniform, hot, dense primordial state to its present state over a span of about 13.75 billion years of cosmological time. This model is well understood theoretically and strongly supported by recent high-precision astronomical observations such as WMAP.'

So the age of 13.75billion is reached because it fits well with the Lambda-CDM concordance model and measurements (though there may be other reasons as well, I can't say). Suppose however we get new data and we need to refine/replace that model as a result. Then it is certainly possible the estimated age moves to 15billion or 12billion to fit better with that new model. To what extent would you regard that as falsifying AEN?