Following that, it would mean, theoretically, that "Není vážit si čeho" should also be equally correct (although it sounds a bit weird). Also, it would mean that my response ("Není si čeho vážit") should not be correct, since the "infinitive phrase" would be reduced to "si čeho vážit". Yet the response was marked as a pass.
Having read through this discussion I am still unclear why a previous answer was "Není se ceho bát". with the reflexive particle in second place in the sentence while here it is second in the clause. Would both be correct in either case or is there a subtle difference which escapes me? Also in this case should a comma follow 'není'. Thank you for all your helpand advice.
both would be correct in either case, and there is no difference in meaning or emphasis. to explain what is happening here would open a few cans of worms (google "clitic climbing in czech" for a preview). we may opt to hide the sentences with the embedded clitics until later in the tree.
no, the comma does not belong in there:
Je‑li infinitiv závislý na slovesu být nebo mít, tvoří s ním těsnou významovou a zvukovou jednotu, čárkou ho neoddělujeme: Není kam jít. Nemá oč se opřít. Nebylo s kým se poradit.
If the infinitive depends on the verbs být or mít, they are tightly bound in meaning and intonation, and we do not use the comma to separate them: Není kam jít. Nemá oč se opřít. Nebylo s kým se poradit.