>>"Invariably, the actual future will confound and frustrate
>>our expectations of it."
>
>-- "a lot of the time" rather than "invariably".
>
>Eg., I can predict how many 20-year-old people will be around >in 2025 with some accuracy (barring catastrophe) because >they've already been born.

You are being pedantic. I am referring to the future as a whole, not predictions of some particular aspects of the future.