Identifying double gutshots easily

[PantsOnFire]

For Type F, you have the board and pocket cards reversed.

It should also be noted that some of these gutshots are very weak. The weakest would be Type B where you hit the upper end and essentially have one card at the idiot's end of the straight.

Obviously, using both your hole cards is stronger than using a four board cards.

As well, some hits would be very disguised and thus have much greater implied odds. Hitting the lower end of Type A would be very good giving you the nuts and a not so obvious hand.

The OP was asking about recognizing the double gutter but on top of that I would suggest he needs to assess the implied odds of his double gutter because they are not all the same as far as concealment and strength.