Crimson Longinus
Legend
Not really. If the former is called for by a player, they are assuming Arcana will be added to the stat check, which isn't their call.
No such checks, regardless what they are called, are called for by the player.
Yes it does. Every skill has a default associated ability. Using another ability is an optional rule, and even if such a rule would be in use, the default still exists.Also, just calling for Arcana doesn't tell you what stat to roll.
It is perfectly understandable that in practice people say "arcana check" instead of excessively loquacious "an intelligence check and add your proficiency bonus if you are trained in arcana."