If jamming is high, FTL drives are small but expensive, and ranges are long then expect fighters.
Well that mostly wrong because:
1) There is no point in jamming in space due to being no stealth in space.
2) A FTL drive will be huge and require huge amount of power and a fighter will not be able to house the fusion reactors needed.
3) A fighter will never have a range more than the local gravity well unless you use a highly compacted fuel source, oxygen tanks, food and water are also needed for a long flight and it is easier to store such items in a huge battleship than a 100 ton fighter.
Wow, you missed the point. I said IF [Condition 1], [Condition 2], & [Condition 3] THEN [Conclusion].
I didn't say that those Conditions would always hold, only that if those conditions hold, and I should have added the condition that a small craft will be able to carry a weapon that can damage a capital ship, then fighters are expected. If you remove two of those (now four) conditions, then the conclusion doesn't hold.
But without further information on the setting, and knowing if the conditions hold true, the plausibility of fighters can not be determined.
What can be determined is that there are a set of conditions that support the existence of space fighters, and by extension space carriers.
Morten, I apologize for this diversion.