**A Physicist, a Chemist and an Engineer are trying to prove that every odd number greater than 1 is prime.**

The Physicist begins:

The Physicist begins: ''3's a prime number,

The Physicist begins: ''3's a prime number, 5's a prime number,

The Physicist begins: ''3's a prime number, 5's a prime number, 7's a prime number.

The Physicist begins: ''3's a prime number, 5's a prime number, 7's a prime number. Clearly this is a universal law, so

The Physicist begins: ''3's a prime number, 5's a prime number, 7's a prime number. Clearly, this is a universal law, so all odd numbers must be prime.

The Physicist begins: ''3's a prime number, 5's a prime number, 7's a prime number. Clearly, this is a universal law, so all odd numbers must be prime.''

Next the Chemist tries:

The Physicist begins: ''3's a prime number, 5's a prime number, 7's a prime number. Clearly, this is a universal law, so all odd numbers must be prime.''

Next the Chemist tries: ''3's a prime number,

The Physicist begins: ''3's a prime number, 5's a prime number, 7's a prime number. Clearly, this is a universal law, so all odd numbers must be prime.''

Next the Chemist tries: ''3's a prime number, 5's a prime number,

The Physicist begins: ''3's a prime number, 5's a prime number, 7's a prime number. Clearly, this is a universal law, so all odd numbers must be prime.''

Next the Chemist tries: ''3's a prime number, 5's a prime number, 7's a prime number.

The Physicist begins: ''3's a prime number, 5's a prime number, 7's a prime number. Clearly, this is a universal law, so all odd numbers must be prime.''

Next the Chemist tries: ''3's a prime number, 5's a prime number, 7's a prime number. Now 9 isn't prime,

The Physicist begins: ''3's a prime number, 5's a prime number, 7's a prime number. Clearly, this is a universal law, so all odd numbers must be prime.''

Next the Chemist tries: ''3's a prime number, 5's a prime number, 7's a prime number. Now 9 isn't prime, but 11 is,

The Physicist begins: ''3's a prime number, 5's a prime number, 7's a prime number. Clearly, this is a universal law, so all odd numbers must be prime.''

Next the Chemist tries: ''3's a prime number, 5's a prime number, 7's a prime number. Now 9 isn't prime, but 11 is and so is 13.

The Physicist begins: ''3's a prime number, 5's a prime number, 7's a prime number. Clearly, this is a universal law, so all odd numbers must be prime.''

Next the Chemist tries: ''3's a prime number, 5's a prime number, 7's a prime number. Now 9 isn't prime, but 11 is and so is 13. So allowing for experimental error,

The Physicist begins: ''3's a prime number, 5's a prime number, 7's a prime number. Clearly, this is a universal law, so all odd numbers must be prime.''

Next the Chemist tries: ''3's a prime number, 5's a prime number, 7's a prime number. Now 9 isn't prime, but 11 is and so is 13. So allowing for experimental error, all odd numbers must be prime.''

The Physicist begins: ''3's a prime number, 5's a prime number, 7's a prime number. Clearly, this is a universal law, so all odd numbers must be prime.''

Next the Chemist tries: ''3's a prime number, 5's a prime number, 7's a prime number. Now 9 isn't prime, but 11 is and so is 13. So allowing for experimental error, all odd numbers must be prime.''

Finally, the Engineer has a go:

The Physicist begins: ''3's a prime number, 5's a prime number, 7's a prime number. Clearly, this is a universal law, so all odd numbers must be prime.''

Next the Chemist tries: ''3's a prime number, 5's a prime number, 7's a prime number. Now 9 isn't prime, but 11 is and so is 13. So allowing for experimental error, all odd numbers must be prime.''

Finally, the Engineer has a go: ''3's a prime number,

The Physicist begins: ''3's a prime number, 5's a prime number, 7's a prime number. Clearly, this is a universal law, so all odd numbers must be prime.''

Next the Chemist tries: ''3's a prime number, 5's a prime number, 7's a prime number. Now 9 isn't prime, but 11 is and so is 13. So allowing for experimental error, all odd numbers must be prime.''

Finally, the Engineer has a go: ''3's a prime number, 5's a prime number,

The Physicist begins: ''3's a prime number, 5's a prime number, 7's a prime number. Clearly, this is a universal law, so all odd numbers must be prime.''

Next the Chemist tries: ''3's a prime number, 5's a prime number, 7's a prime number. Now 9 isn't prime, but 11 is and so is 13. So allowing for experimental error, all odd numbers must be prime.''

Finally, the Engineer has a go: ''3's a prime number, 5's a prime number, 7's a prime number,

The Physicist begins: ''3's a prime number, 5's a prime number, 7's a prime number. Clearly, this is a universal law, so all odd numbers must be prime.''

Next the Chemist tries: '3's a prime number, 5's a prime number, 7's a prime number. Now 9 isn't prime, but 11 is and so is 13. So allowing for experimental error, all odd numbers must be prime.''

Finally, the Engineer has a go: ''3's a prime number, 5's a prime number, 7's a prime number, 9's a prime number....''

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