Skill/Ability checks during conversion, how they work?

[Darth Siles]

I don't get it.... maybe i'm completely stupid but i don't get how they work...

I mean, i understand how it work evidently, but i don't know if i have a bug or something. I'll explain:

I had two chances during the game to use this "skill checks" during a conversation, in both i had less level than the required, but anyway, it worked fine using that option.

With a little bit of Spoilers ahead (you've warned)...

First time in downtown, the two teens listening loud music... there was a Engineering check (level 2), and i as was 0 points at that moment, but i could use it and it worked.

Same thing happened later in the bank heist, to defuse the bomb. I think it was level 4 check, and at that time i was at level 2. It worked too

I'm understanding something wrong???

[Lardo]

Don't worry about it. First one is probably a bug, and the defusing the bomb is mandatory. Maybe the skill makes it easier or something, IDK. I maxxed out engineering way before this point for the chip bonus.

[Darth Siles]

I'm now in the prison level and i passed a psicology level 5 and 6 check with a level 4 skill.

This is broken.

[Desperado]

The Psychology skill lowers skill check requirements, but it's not consistent.