Final answer:
The logical conclusion from the statement is that if George does not have eight legs, he is not a spider, because having eight legs is a definitive characteristic of spiders as arachnids.
Step-by-step explanation:
The statement 'If George does not have eight legs, then he is not a spider' leads us to a logical conclusion based on the biological characteristics of arachnids. Given that all spiders, which are classified as arachnids, are known to have eight legs, we can infer that if an organism doesn't possess eight legs, then it cannot be a spider. This is because having eight legs is a defining characteristic of spiders, which distinguishes them from insects and other arthropods that might have a different number of legs, such as insects that have six.
It's important to understand that reaching a logical conclusion requires considering all relevant information. In this case, we know that one premise is that arachnids, including spiders, have eight legs. If George does not meet this criterion, according to biological classification, he would not fit the definition of a spider. This is akin to constructing a logical argument where the presence of certain characteristics (such as the number of legs) is crucial for classification within a certain group. If the characteristic is absent, then the organism does not belong to that group.