no clue how to do this

Write a concluding statement for each of the following chains of reasoning.


If a then b
If d then not c
If not c then a
If not b then f





New problem



if p then not q
if r then not q
if s then r

Note: The string "->" is commonly used for the "if-then" arrow. (When in doubt, though, always spell things out, as you did. Thank you.)

I think you have:

. . . . .If a, then b.
. . . . .If p, then not-q.
. . . . .If d, then not-c.
. . . . .If r, then q.
. . . . .If b, then f.

I'm afraid I don't see how these relate to each other, nor how, without any actual givens, you're supposed to conclude anything. They've told you "if you have thus and such, then you can conclude this other", but they haven't given you any actual "thus and such" to work with.

Eliz.