Wonder 'if' embedded, know 'whether' semi-question

This paper investigates the differences between the clausal complements of know and wonder predicates and argues that while the former merges with straightforward [-Q] CPs, don’t know and wonder merge with [+Q] embedded questions. Observations regarding embedded T-to-C, embedded wh-the-hell phrases and Q-particles are in support of the claim that wonder-verbs merge with cPs with extra [+Q] machinery which licenses the abovementioned phenomena. The paper also claims that (non-conditional) if bears a [+Q] feature, unlike its [-Q] counterpart, whether, and that the distribution of if / whether and Q-particles in embedded clauses can distinguish between semi-question / embedded question selecting predicates.