vocab: stop re-teaching a word later in the same session (239 tags)

A word tagged VOCAB in one activity was tagged again in later activities of the
same session, so the learner got the same chip repeatedly — most visibly in the
pronunciation drills, which re-listed every word from the dialogue before them
(reported: book 7 session 1-2). Rule applied: drop a VOCAB whose word was
already tagged in an EARLIER activity of that session. Repeats INSIDE one
activity are kept — those teach distinct senses ('stuck to his finger' vs
'stuck the milk in the fridge', 'shop' as verb then noun). Also dropped chips
for plurals of already-known words in book 7 session 1-2, where the drill
teaches the singular/plural pair rather than new vocabulary. No session lost
all of its vocabulary (verified).

Co-authored-by: Cursor <cursoragent@cursor.com>

book-12-lesson-4.module

@@ -174,7 +174,6 @@ LINE: Deer season this year will begin next week.
 VOCAB: preparing
 LINE: Both Fred and Pete are getting ready for their hunting trip. They're preparing their weapons.
 
-VOCAB: country
 VOCAB: practice
 VOCAB: shoot
 LINE: Fred has just bought a new rifle, so he and Pete have driven out of the city to the country to practice with it. Fred is going to shoot at some empty soda cans.
@@ -190,12 +189,10 @@ Pete: Good, Fred, that was a good shot. Do it again.
 
 LINE: Bang!!!!
 
-VOCAB: low
 Pete: You missed that time. You weren't low enough. You have to shoot lower.
 
 LINE: Bang!!!!
 
-VOCAB: high
 Pete: You're still shooting too high, Fred.
 
 LINE: Bang! . . . bang! . . . bang! . . . bang! . . . bang!
@@ -687,7 +684,6 @@ INTRO: Melissa catches her first fish — almost. Listen to Richard's coaching a
 INSTRUCTION: Listen and repeat the dialog.
 REPEAT
 
-VOCAB: all over
 Melissa: Are there fish all over or just in some parts of the lake?
 
 VOCAB: everywhere
@@ -695,12 +691,8 @@ Richard: They're everywhere but some places are better for catching them.
 Melissa: I've caught one! I've caught one! What do I do next?
 
 VOCAB: line
-VOCAB: slow
-VOCAB: hard
 Richard: Pull the line in slow. Don't pull it hard because you may lose the fish.
 
-VOCAB: once
-VOCAB: twice
 Melissa: It's gone. This has happened to me not once, but twice already.
 Richard: Don't worry. Two times is nothing. You'll learn.
 
@@ -734,15 +726,12 @@ REPEAT
 Charlie: Okay, Melissa; give me further instructions. Tell me how to prepare the fish.
 VOCAB: few
 Melissa: Have you caught a few fish already?
-VOCAB: several
 Charlie: Yes, I've caught several, about four or five. So tell me.
 Melissa: First, make a fire. Next, clean the fish and put some lemon juice, salt, and pepper on it. Then cook it in very hot oil.
 Charlie: One fish is ready. Who wants it?
 Chris: I do.
-VOCAB: whole
 Charlie: Do you want the whole fish or just half, Chris?
 Chris: I'll take a whole one.
-VOCAB: more
 Charlie: Was one enough or do you want more?
 VOCAB: more than enough
 Chris: No. One was plenty. It was more than enough.