There is no XP for "outwitting" if that doesn't yield treasure.
the Dungeon Master will award experience points to the character for treasure gained and opponents captured or slain and for solving or overcoming problems through professional means. . . .
As a rule, one point of experience will be awarded for one gold piece gained by a character, with copper pieces, silver pieces, electrum pieces, platinum pieces, gems, jewelry, and like treasure being converted to a gold piece value. Magic items gained and retained have only a low experience point value, for they benefit the character through their use. Magic items gained and sold immediately are treated as gold pieces, the selling price bringing an award in experience on the stated one for one basis. Experience points awarded for treasure gained - monetary or magical - are modified downward if the guardian of the treasure (whether a monster, device, or obstacle, such as a secret door or maze) was generally weaker than the character who overcame it.
Monsters captured or slain always bring a full experience point award. Captured monsters ransomed or sold bring a gold piece: experience point ratio award. Monsters slain gain a set point award.
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The judgment factor is inescapable with respect to weighting experience for the points gained from slaying monsters and/or gaining treasure. You must weigh the level of challenge - be it thinking or fighting - versus the level of experience of the player character(s) who gained it. . . .
Tricking or outwitting monsters or overcoming tricks and/or traps placed to guard treasure must be determined subjectively, with level of experience balanced against the degree of difficulty you assign to the gaining of the treasure. . . .
Convert all metal and gems and jewelry to a total value in gold pieces. If the relative value of the monster(s) or guardian device
fought equals or exceeds that of the party which took the treasure, experience is awarded on a 1 for 1 basis. If the guardian(s) was relatively weaker, award experience on a 5 g.p. to 4 x.P., 3 to 2,2 to 1,3 to 1, or even 4 or more to 1 basis according to the relative strengths. . . .
Treasure must be physically taken out of the dungeon or lair and turned into a transportable medium or stored in the player's stronghold to be counted for experience points.
All items (including magic) or creatures sold for gold pieces prior to the awarding of experience points for an adventure must be considered as treasure taken, and the gold pieces received for the sale add to the total treasure taken. (Those magic items not sold gain only a relatively small amount of experience points, for their value is in their usage.)
There are two sources of XP: treasure, and creatures slain or captured. Treasure XP is weighted by the difficulty of obtaining it, be that via fighting or outwitting or avoiding a trap or whatever. Creature XP is based on the strength of the creature; or, if sold/ransomed, on the money received.
There is no separate XP award just for outwitting people to no end.