"Tio estas saĝa decido."

Translation: That is a wise decision.

[kebukebu]

[jimnice]

That is a sage decision; rejected; reported.

[carbsrule]

Sagacious?

[nowo1978]

Why is it "tio" and not "tiu"? I thought that "tio" is only used for unspecified things, but in this sentence, the subject is very well specified, because I could also say "Tiu decido estas sagxa decido", but I would never say "Tio decido estas sagxa decido". Any thoughts?

[InoAuxIcxo]

The particular thing (that was wise) was not said.