What is the ruling on using western styled toilets?

Question 9: Is it permissible to use western style toilets?

Answer: All Praise is due to Allaah Alone and peace and blessings be upon His Messenger, his family, and Companions. To commence: It is permissible to use any toilets but try to protect your bodies and clothes from Najaasah (ritual impurity) when relieving yourselves. After finishing, you should follow the Islaamic way either by performing Istijmaar (cleansing the private parts with hard material after urination or defecation) or Istinjaa’ (cleansing the private parts with water after urination or defecation) and… read more here.

Regarding a person who denies the punishment in the grave?

Question 4: What about a person who denies the punishment in the grave, because the reports in this regard are Hadith-ul-Ahad (Hadiths which at some point in the chain have only a single narrator) which -they hold- can never be taken as basis for beliefs? They do not judge reports in terms of authenticity, acceptability, and weakness, but in terms of the numerous chains of transmission; whether it is a singular report or recurrently reported at each generation of narrators. Upon finding out that a certain report is singular, they reject it. How does one respond to this?

Answer: All Praise is due to Allaah Alone. Peace and blessings be upon His Messenger, his family, and Companions. To commence, if a singular report is authentically reported from Allaah’s Messenger (peace be upon him), it is a credited proof according to the consensus of Ahl-al-Sunnah wal-Jamaa`ah (those adhering to the Sunnah and the Muslim community), whether on issues of worship or creed… read more here.

What is the meaning of the following two terms in Hadeeth: Mawqoof and Mursal?

Question 4: What is the meaning of the following two terms that I find in Hadeeth books: Mawqoof and Mursal?

Answer: (1) Hadeeth Mawqoof is the own statement of a Companion of the Prophet who did not ascribe it to the Prophet (peace be upon him). (2) According to… read more here.