Poke holes [blank] an argument

Poke holes at is rarely used in a figurative sense (Ngram).

Poke holes in an argument usage examples:

From Infusion: 90 Daily Doses of Wisdom, Truth and Encouragement

• A submitted student of Scripture is not trying to poke holes in an argument with a condescending attitude. If this is the case, he has missed the point of searching the Scripture for truth. The reason you seek to validate a message from Scripture ...