Mysterium

No — once the ghost gives vision card(s) to a psychic in a turn he must push that psychic’s ghost token to mark them and cannot give that psychic any more cards during the same turn (p.9).

Psychics may freely examine cards and discuss hypotheses during the Vision Interpretation step (p.9), but the final straw-poll vote must be secret and psychics must not communicate during the voting procedure (p.11).

No — a psychic may not play more than one clairvoyancy token on the same intuition token nor add a clairvoyancy token to his or her own intuition token; however a player may play as many clairvoyancy tokens as they want overall during a turn (p.10).

If a psychic is correct the ghost flips the matching ghost card, the psychic slides that card into their sleeve, discards their vision cards, takes their intuition token and places it on the next progress board, and any players who played ✓ tokens on that intuition token move their clairvoyancy markers forward one space (p.10).

It depends on difficulty: on EASY the ghost may discard once per turn, on MEDIUM up to three times during the game, and on HARD once during the game; the crow rules and limits are explained on the discard section and the difficulty table (p.9; difficulty table on p.8).

Ties are broken in favor of the group chosen by the player who progressed furthest along the clairvoyancy track; if a tie persists it is broken in favor of the group for which the eldest player voted (p.12).