For example, this is a rule from the game that is used during the opening bid:

If "point count" is in the range 12 to 21, you have a good hand

This rule tests the value of the counter "point count". If the test is true, the rule reaches a true conclusion concerning the quality of your hand. The counter was set by an earlier rule:

set "point count" to high card count + short suits (0=3 1=2 2=1)

Testing "point count" answers the question: Do you have a good hand? If you have from 12 to 21 points, you have a good hand. The question of whether you have a good hand came up in the context of a previous rule:

If you have a good hand and you have a biddable suit, you have a good hand with a biddable suit

If you counted your points and found that you have a good hand, then you would want to see if you also have a biddable suit. If you have a suit worth bidding, then you would come to the conclusion that you have a good hand with a biddable suit. And, by a higher rule:

If you have a good hand with a biddable suit, bid 1 of best suit

Note that, while the hand was being checked for a biddable suit, the variable best suit was set to the most biddable suit found.

You can read the rules and follow them to bid. The rules look like something you might see in a book on bridge. The game can also read and follow the rules to make a player's bid.

There is an additional benefit to having the bidding process captured in rules. After player A bids, their partner B can review the rules to find which rules A followed to make A's bid. B can then extract the information A must have used to make the bid.

This makes the meaning of a bid equal to the information a player used in deciding upon their bid. The game can display this information in terms of suit length and strength.

The game also plays according to a set of rules. Playing rules are much different from bidding rules.