Boy's fingers have the internet confused

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Reddit user Rdelly_21 posted a photo of his brother's fingers to the internet, claiming something was going on with them.

At first glance, it's really hard to tell what's up.

Need a hand?

The boy does not have creases on two of his fingers on his right hand.

Reddit users, as they do, began theorizing what could have happened to the boy's fingers.

One person said he thought that those two fingers had been fused together.

The brother replied to the theory, saying, "That must be the case! He cannot bend them at the distal joint of those two fingers."

Other Redditors chimed in, saying he might have a joint disorder called Arthrogryposis, which makes it hard to bend certain joints and sometimes leads to deformities.

One thing is for sure -- the subtle mutation must be a great "interesting fact" to use as an icebreaker.

Check out photos of a very interesting family with finger deformities:

15 PHOTOS
6-fingered Silva family, Brazil soccer team
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6-fingered Silva family, Brazil soccer team
Members of the Silva family, back row, from left, Silvia Santos, Joao de Assis, Pedro de Assis, Ana Carolina Santos and Silvana Santos, front row, Bernardo de Assis, left, and Maria Morena Santos, pose for a photo in their home to show that they each have six fingers on each of their hands, in Brasilia, Brazil, Thursday, June 19, 2014. The family was born with an extra digit on each hand as a result of a genetic condition known as polydactyly. (AP Photo/Eraldo Peres)
Silvia Santos, facing camera, embraces her daughter Ana Carolina at their home in Brasilia, Brazil, Thursday, June 19, 2014. All the members of the Silva family were born with an extra digit on each hand as a result of a genetic condition known as polydactyly. Rather than recoil in the face of constant stares by curious onlookers the 14 members of the family spanning four generations seem to embrace their physical differences with pride. (AP Photo/Eraldo Peres)
Silvia Santos, facing camera, embraces her daughter Ana Carolina at their home in Brasilia, Brazil, Thursday, June 19, 2014. All the members of the Silva family were born with an extra digit on each hand as a result of a genetic condition known as polydactyly. Rather than recoil in the face of constant stares by curious onlookers the 14 members of the family spanning four generations seem to embrace their physical differences with pride. (AP Photo/Eraldo Peres)
A general view shows the Maracana Stadium in Rio de Janeiro prior to a Group B football match between Spain and Chile during the 2014 FIFA World Cup on June 18, 2014. AFP PHOTO / YASUYOSHI CHIBA (Photo credit should read YASUYOSHI CHIBA/AFP/Getty Images)
Brazil's Neymar runs with the ball during the group A World Cup soccer match between Brazil and Mexico at the Arena Castelao in Fortaleza, Brazil, Tuesday, June 17, 2014. (AP Photo/Andre Penner)
Brazil's Neymar, right, gets past Mexico's Francisco Rodriguez during the group A World Cup soccer match between Brazil and Mexico at the Arena Castelao in Fortaleza, Brazil, Tuesday, June 17, 2014. (AP Photo/Andre Penner)
TERESOPOLIS, BRAZIL - JUNE 19: Neymar in action during a training session of the Brazilian national football team at the squad's Granja Comary training complex, on June 19, 2014 in Teresopolis, 90 km from downtown Rio de Janeiro, Brazil. (Photo by Buda Mendes/Getty Images)
(top L-R) Brazil's defender David Luiz, Brazil's goalkeeper Julio Cesar, Brazil's defender Thiago Silva, Brazil's forward Fred, Brazil's midfielder Luis Gustavo and (bottom L) Brazil's midfielder Oscar, Brazil's defender Dani Alves, Brazil's forward Neymar, Brazil's midfielder Ramires, Brazil's midfielder Paulinho, Brazil's defender Marcelo line up a Group A football match between Brazil and Mexico in the Castelao Stadium in Fortaleza during the 2014 FIFA World Cup on June 17, 2014. AFP PHOTO / VANDERLEI ALMEIDA (Photo credit should read VANDERLEI ALMEIDA/AFP/Getty Images)
FORTALEZA, BRAZIL - JUNE 17: Neymar of Brazilgets up after falling to the ground during the 2014 FIFA World Cup Brazil Group A match between Brazil and Mexico at Estadio Castelao on June 17, 2014 in Fortaleza, Brazil. (Photo by Lars Baron - FIFA/FIFA via Getty Images)
FORTALEZA, BRAZIL - JUNE 17: Neymar (R) of Brazil clashes with Mexico's Fabian (front) at World Cup match between Brazil and Mexico in the Estádio Castelão World Cup stadium in Fortaleza, northeast Brazil, June 17, 2014. (Photo by Levi Bianco/Anadolu Agency/Getty Images)
FORTALEZA, BRAZIL - JUNE 17: (CHINA OUT, SOUTH KOREA OUT) Neymar of Brazil is brought down during the 2014 FIFA World Cup Brazil Group A match between Brazil and Mexico at Castelao on June 17, 2014 in Fortaleza, Brazil. (Photo by The Asahi Shimbun via Getty Images)
Brazil's Neymar controls a ball during the group A World Cup soccer match between Brazil and Mexico at the Arena Castelao in Fortaleza, Brazil, Tuesday, June 17, 2014. (AP Photo/Themba Hadebe)
Croatia's Ivan Perisic, left, challenges Brazil's Hulk for the ball during the group A World Cup soccer match between Brazil and Croatia, the opening game of the tournament, in the Itaquerao Stadium in Sao Paulo, Brazil, Thursday, June 12, 2014. (AP Photo/Felipe Dana)
Brazil's Neymar, right, celebrates with teammate Hulk after scoring during the group A World Cup soccer match against Croatia in the opening game of the tournament at Itaquerao Stadium in Sao Paulo, Brazil, Thursday, June 12, 2014. (AP Photo/Frank Augstein)
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