How do you play the card game lie detector?

It seems you're thinking of a card game called "Truth or Dare" or possibly "Bulls and Cows", which are both games that involve guessing numbers or words, but are not commonly called "Lie Detector."

Let me explain both games so you can identify which one you're thinking of:

Truth or Dare

* Players: 2 or more

* Goal: To challenge other players to do fun, embarrassing, or silly tasks.

* How to Play: Players take turns choosing to answer a "Truth" question truthfully or perform a "Dare" challenge. Questions and dares can range from silly to outrageous.

* Key Point: This game is all about fun and getting to know your friends better.

Bulls and Cows (also known as "Guess the Number" or "Code Breaker")

* Players: 2

* Goal: To guess a secret four-digit number, with no repeating digits, created by the other player.

* How to Play:

1. One player chooses a secret four-digit number with no repeating digits.

2. The other player guesses a four-digit number.

3. The first player provides feedback:

* Bulls: Each digit that is in the correct position is a "Bull."

* Cows: Each digit that is in the secret number but in the wrong position is a "Cow."

4. The guessing player continues to guess based on the feedback until they correctly guess the secret number.

* Key Point: This game is about logic, deduction, and strategy.

If neither of these games is what you're looking for, please provide more details about the game you're thinking of, like:

* How many players play?

* What is the goal of the game?

* What type of cards are used?

* What are the general rules?

With more information, I can help you understand the rules of the game.