Hello,
I have two remarks about the correction of the quiz 4:
- For Question I.3, we are asked to "Indicate which of the following constraints should be enforced for the stochastic grammar G2 so that the most-probable parse is making use of the rule...". In the correction, you mention that p2 < p1 · p6 is a solution because it implies p2 · p5 < p1 · p6. But p2 < p1 · p6 is not necessary (e.g. p1=0.6, p2=0.5, p5=0.5, p6=0.6 satisfies p2 · p5 < p1 · p6 but not p2 < p1 · p6), so it should not be enforced, but it could be.
- For Question VI, I do not understand how the proposition "Each component of <d3> is strictly larger than the corresponding one in <d1>" can be true given that some components of <d1> and <d3> are 0 because tf(t,d1)=tf(t,d3)=0 for some indexing terms t (and probably many) that are not in the document.
Thank you in advance for your answer!