# Which one of the following could be the order, from first to last, in which the actors appear?

schicago on July 22, 2020

Conditional and sequences

When a game involves a conditional sequencing like this one- how can I understand whether I should be making two separate block sequences or just leaving the conditional in as it is? I lost a lot of time trying to create two separate "clue worlds".

shunhe on July 22, 2020

Hi @schicago,

Thanks for the question! So generally speaking, I would first diagram the conditional as a rule, in this case we would diagram:

M—P —> H—G

and we can also note the contrapositive, which is

G—H —> P—M

And then from there, we can see if it’s worth diagramming out what happens in those cases. What happens if M is before P, and what happens if G is before H. If those are simple to incorporate into our diagram, we can draw out a couple of templates showing how the diagram evolves in those cases. I think this is similar to what you meant by building out “clue worlds.” But all that we have to do is note that for example if M comes before P, we also know that M and L come before H, and H comes before G (since M came before P). We also know that P and L both come before J, and G doesn’t come last, so the only actor that can appear last is J. And we can diagram the rest out as well.

We can also have a template for the contrapositive, though it’s a bit trickier in this specific game. If it’s too complicated and you’re spending a lot of time on it, it may be better to just move onto the questions and make sure you know to apply the rule when it appears.

Hope this helps! Feel free to ask any other questions that you might have.