# Is "consecutive" a subset of "sequential"?

Going straight to the dictionary, we can see that:

Consecutive means: something following something else without interruption.

Some examples:

1. He did 100 consecutive push-ups (1, 2, 3, ..., 99, 100)

2. He scored 3 consecutive goals (meaning that a player scored 3 goals without any other team-mate scoring in between)

2.1 Ronaldo scored in min. 25, 50, 75. He scored 3 consecutive goals. Had somebody else from his team scored anywhere between 25-75 his goals wouldn't have been consecutive.

3. He had to take his medicine for 14 consecutive days (2 weeks straight, without interruption).

Sequential means: following a particular order.

The above doesn't mean without interruption though. It just has to follow a predictable pattern.

Some examples:

1. Computer instructions are always executed sequentially, the order being top-down as they are encountered in the program.

2. The Fibonacci sequence: 1, 2, 3, 5, 8, 13, 21, ... is a sequence where each number is the sum of the preceding two numbers.

3. I described the events sequentially, but in reverse order, starting with the conclusion.

4. We were given a list of sequential numbers comprising even multiples of 10. (20, 60, 100, say every 4 multiples)

5. He was used as a defender every 5 games for 6 sequential World Cups (this is a case where you might substitute sequential with consecutive but it's also correct to interpret this as say every 2 World Cups, or every 3 World Cups is it not?). Without knowing further information this is ambiguous just like biweekly which can mean both every 2 weeks and twice a week.

6. They were using a sequence of numbers comprising multiples of five. Note that this can also be interpreted as consecutive since it doesn't specify any further details about the multiples.

So all in all I've seen folks using these 2 terms interchangeably. While this might be true it's not always the case. They can be used interchangeably when the elements that they're describing are immediately following one after another but not otherwise.

Is the above correct or did I misunderstand anything?