What does What does 'when' mean specifically in this sentence?
1. considering that
2. in spite of the fact that

"I doubt the validity of animal experimentation when it is assumed that animals' bodies responds to drugs the way human bodies do." mean?

See a translation

@dent9704 I looked 'when' up in the dictionary and found a few possible candidates about the meaning of it.

1. considering the fact that:
-I don't suppose I can really call myself a vegetarian when I eat fish.
-Why is she training to be a teacher when she doesn't even like children?

2. despite the fact that:
-He says he doesn't have any money when in fact he has thousands of dollars in his account.
-I don't understand how he can say that everything's fine when it's so obvious that it's not.

3. in the event that : IF
-a contestant is disqualified when he disobeys the rules

4. used to mention a type of event or situation when talking about what happens on occasions of that type => I think this usage might be merged into #3
-When lead is added to petrol, it improves the car’s performance.

5. used for introducing a situation that makes someone’s action or behaviour seem surprising
=> I think this usage might be merged into #1 or 2
-He went on protesting his innocence when he was obviously guilty.

What do you think?

@dent9704 Thank you for your help!