Is a Squirrel a rodent or marsupial?

Is a squirrel, any one of the many small or medium-sized rodents in the family Sciuridae a member of the class Rodentia, an order of mammals known as rodents, characterised by a single pair of continuously growing incisors in each of the upper and lower jaws which must be kept short by gnawing or the class Marsupial (Marsupials, the infraclass of mammals, characterized by giving birth to relatively undeveloped young)?

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Show reasoning Reasoning

I followed this chain of reasoning:

By calculation (generator: ["in_group@trueknowledge.com"]) I know that:
rodent is in the group rodent and marsupial

marsupial is in the group rodent and marsupial

By calculation (generator: ["now@trueknowledge.com"]) I know that:
The current time is May 24th 2013, 18:28:56

I know from locally stored knowledge that:
Fact 1: Squirrel is a subclass of rodent ([fact: ["130986293@trueknowledge.com"]])

By calculation (generator: ["perm5@trueknowledge.com"]) I know that:
Fact 1 is true for all time

By calculation (generator: ["timeperiodtopoint@trueknowledge.com"]) I know that:
Fact 1 is true at May 24th 2013, 18:28:56

I know from locally stored knowledge that:
permanent applies to is a subclass of ([fact: ["123877657@trueknowledge.com"]])

I used the following facts to provide this answer:

Squirrel is a subclass of rodent

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