In a campaign using both Advanced Dungeons & Dragons and Advanced Dungeons & Dragons, 2nd Edition material, what methods are available to detect lies or sense deception, like seeing through a disguise?
The scenario was with a traveling Hag disguised as a Gypsy who was lying to the Adventuring party trying to convince them to deliver an amulet (cursed of course) to her "niece".
There's a "Penetrate Disguise" spell, which would detect the Hag's Gypsy/Merchant occupation was false (as the Hag was strictly speaking a "witch", not a "merchant"), but would not detect she was shape shifted into an old woman. Detecting she's not really a gypsy merchant indirectly notifies the party she's deceiving them, even if her words sound authentic.
There's "Detect Evil" available to both 1st level clerics and Paladins (which is how the party solved the problem) though this doesn't detect lies, it does present a reason for the group to be more distrusting.
"Detect Lie" was a 4th level spell (7th level caster), and being a 4th level party, there was no way they were going to have access to that.
and the spell-like ability to change self at will. Hags use this last ability to attract victims, frequently posing as young human or demihuman females, helpless old women, or occasionally as orcs or hobgoblins. A disguised hag reveals her true form and leaps to the attack when weak opponents come near. Against well armed and armored parties, hags maintain their disguise and employ further trickery designed to place the intended victim in a more vulnerable position. This trickery can take any of several forms, including verbal persuasion, leading the victim into a prearranged trap, and so on. (MM 181)
I gave some other subtle hints (introduced herself as Meghan Greenespire, Meg is the name of the Green Hag from Legend, called her niece Lizabelle, the "Liz" pronounced "LIES")
So im wondering if something like Sage Knowledge: Folklore (witches & hags), or the priest proficiency Observation (both from Spells & Magic) can be blind checked - i.e., non proficient checks for people who don't have those proficiencies, and perhaps what kinds of penalties? I ask because in AD&D some proficiencies allow a check with a penalty, and others don't allow any check at all. Seems like Folklore knowledge would be completely random, while Observation or similar proficiencies would be a check at a penalty.