No restrictive trade policies fail to invite retaliation.
Trade wars threaten our standard of living.
Some Chinese trade policies are restrictive.
Policies that invite retaliation lead to a trade war.
Some Chinese trade policies threaten our standard of living.

The following sorites are valid. Rewrite each sorites in standard form, using letters to represent the terms and reducing the number of terms whenever necessary. Then use Venn diagrams or the rules method to prove each one valid.