Poke a hole through (something) American British phrasal verb
1. To create a hole by stabbing at something with something else
Stop poking holes in the carton box! It is used to contain household stuff.
They have poked a hole in the wall to eavesdrop on the quarrels between debtors.
2. To indicate some gaps or flaws in a particular plan, project, opinion, etc
The judge quickly pokes a hole in her statement.
In the scientific research meeting, the lecturers began poking a few holes in our study.
The verb "poke" should be conjugated according to its tense.
To keep optimistic or have hope that something positive will occur and simultaneously prepare for a negative outcome
All I can do is hoping for the best and preparing for the worst.