If the proposition "Some fishes are not egg-laying animals" is given as true, then which of the following propositions could be immediately inferred to be false?

The correct answer is All fishes are egg-laying animals..

Key Points If the proposition "Some fishes are not egg-laying animals" is given as true, then the proposition "All fishes are egg-laying animals" could be immediately inferred to be false.

• The given proposition "Some fishes are not egg-laying animals" indicates that there exists at least one fish that does not lay eggs. This means that there is a subset of fishes that are not included in the category of egg-laying animals.
• If the proposition "All fishes are egg-laying animals" were true, it would mean that every single fish belongs to the category of egg-laying animals.
• However, since we have established that at least one fish does not lay eggs (as per the given proposition), the statement "All fishes are egg-laying animals" cannot be true.

Therefore, the proposition "All fishes are egg-laying animals" can be immediately inferred to be false based on the given information